Holdings: COM and .NET interoperability

COM and .NET interoperability:

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Bibliographic Details
Main Author:	Troelsen, Andrew (Author)
Format:	Book
Language:	English
Published:	Berkeley, CA Apress 2002
Series:	Intertech instructor series .Net developer series
Subjects:	COM (Computer architecture) Computer software > Development Microsoft .NET Framework Object-oriented programming (Computer science)
Online Access:	Inhaltsverzeichnis
Physical Description:	XXIX, 769 S. Ill.
ISBN:	1590590112

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MARC


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adam_text	CONTENTS ACKNOWLEDGMENTS ...............................................................................................XXIII INTRODUCTION .............................................................................. .........................XXV CHAPTER 1 UNDERSTANDING PLATFORM INVOCATION SERVICES ........................................................1 THE TWO FACES OF UNMANAGED CODE ..................................................................1 UNDERSTANDING THE C-STYLE DLL ......................................................................2 EXPORTING CUSTOM MEMBERS .............................................................................. 3 BUILDING A CUSTOM C-BASED DLL ......................................................................5 FUNCTIONS USING BASIC DATA TYPES AND ARRAYS.................................................. 6 FUNCTIONS RECEIVING STRUCTURES (AND STRUCTURES CONTAINING STRUCTURES) .......7 FUNCTIONS USING CLASS TYPES ..............................................................................8 VIEWING YOUR IMPORTS AND EXPORTS USING DUMPBIN.EXE ........................9 DEPLOYING TRADITIONAL DLLS ...........................................................................12 A DYNAMIC C++ DLL CLIENT ...............................................................................15 DYNAMICALLY LOADING AN EXTERNAL LIBRARY ......................................................15 INVOKING MEMBERS .............................................................................. ..............16 THE ATOMS OF PINVOKE ........................................................................................18 DATA TYPE CONVERSIONS .............................................................................. .......18 THE MARSHAL CLASS .............................................................................. ...............20 THE DLLIMPORTATTRIBUTE TYPE ............................................................................25 A TRIVIAL PINVOKE EXAMPLE .............................................................................26 SPECIFYING THE EXACTSPELLING FIELD ...................................................................29 SPECIFYING THE CHARACTER SET ............................................................................29 SPECIFYING CALLING CONVENTIONS .......................................................................30 SPECIFYING FUNCTION ENTRY POINTS ....................................................................31 SETLASTERROR AND MARSHAL.GETLASTWIN32ERROR() ............................................32 INTERACTING WITH MYCUSTOMDLL.DLL .............................................................33 MARSHALING ARRAYS .............................................................................. ...............34 PASSING STRUCTURES .............................................................................. ...............35 RECEIVING ALLOCATED STRUCTURES .........................................................................37 INTERACTING WITH EXPORTED CLASS TYPES ............................................................39 EXAMINING THE UNDERLYING IL ...........................................................................41 WORKING WITH UNMANAGED CALLBACKS .............................................................42 A SIMPLE CALLBACK EXAMPLE .............................................................................43 A MORE INTERESTING CALLBACK FUNCTION .....................................................44 BUILDING A C# CALLBACK CLIENT ....................................................................46 SUMMARY ....................................................................................................................49 VII CHAPTER 2 THE ANATOMY OF A COM SERVER .................................51 OF CLASSES AND INTERFACES .............................................................................51 INTERFACES FROM A NON-COM PERSPECTIVE ........................................................52 CLEANING UP THE INTERFACE DEFINITION ..............................................................54 BUILDING THE CLASS TYPES .............................................................................. .....55 INTERFACES ARE STRONGLY TYPED VARIABLES ..........................................................58 CLASSES CAN SUPPORT MULTIPLE INTERFACES ........................................................59 INTERFACES PROVIDE A VERSIONING SCHEME ......................................................... 61 THE COMPOSITION OF A COM DLL ......................................................................63 THE ROLE OF TYPE LIBRARIES ...........................................................................65 THE FULL MIDL OUTPUT .............................................................................. ........66 THE ROLE OF THE SYSTEM REGISTRY ................................................................66 CREATING THE COM DLL PROJECT WORKSPACE ................................................67 UNDERSTANDING COM INTERFACES ......................................................................68 THE ROLE OF THE GUID ........................................................................................68 THE ROLE OF IUNKNOWN ...................................................................................... 71 DEFINING THE ICAR INTERFACE IN IDL ...................................................................73 THE ROLE OF THE HRESULT ................................................................................. 74 IDL PARAMETER ATTRIBUTES ..................................................................................74 DEFINING THE COCLASS (COMCAR) IN IDL ............................................................75 DEFINING THE [DEFAULT] INTERFACE .......................................................................76 DEFINING AND SUPPORTING MULTIPLE INTERFACES................................................. 76 COMPILING THE IDL FILE WITH THE MIDL COMPILER ...........................................77 EXAMINING THE MIDL-GENERATED FILES .............................................................78 A BRIEF WORD ON COM-CENTRIC MACROS .........................................................79 IMPLEMENTING THE COMCAR .................................................................................80 IMPLEMENTING IUNKNOWN .................................................................................81 IMPLEMENTING ICAR AND IRADIO ........................................................................83 UNDERSTANDING ICLASSFACTORY ........................................................................84 BUILDING YOUR CLASS FACTORY ........................................................................85 IMPLEMENTING ICLASSFACTORY::CREATEINSTANCE() .............................................86 IMPLEMENTING ICLASSFACTORY::LOCKSERVER() ....................................................87 IMPLEMENTING DLL COMPONENT HOUSING .........................................................88 MANAGING SERVER LIFETIME: DLLCANUNLOADNOW()............................................ 88 CONTENDING WITH DLLREGISTERSERVER() AND DLLUNREGISTERSERVER() ..................90 EXPORTING THE EXPORTS ......................................................................................90 REGISTERING THE COM SERVER ...........................................................................91 PROGRAMMATIC IDENTIFIERS (PROGIDS) ................................................................ 91 A CRITICAL KEY: HKEY_CLASSES_ROOT CLSID .............................................92 ANOTHER CRITICAL KEY: HKEY_CLASSES_ROOT TYPELIB ................................. 94 OTHER COM REGISTRATION POSSIBILITIES ..............................................................94 REGISTERING YOUR COM SERVERS ..........................................................................95 CONTENTS VIII DEVELOPING A C++ COM CLIENT ........................................................................97 ACTIVATING COM OBJECTS .............................................................................. .....97 ACCESSING A COCLASS USING COCREATEINSTANCE() ............................................100 BUILDING A C++ CLIENT USING THE #IMPORT DIRECTIVE ......................................102 A VISUAL BASIC 6.0 COM CLIENT ........................................................................103 UNDERSTANDING COM PROPERTIES ....................................................................105 IDL SYNTAX FOR INTERFACE PROPERTIES ...............................................................106 PROPERTIES: THE CLIENTS POINT OF VIEW ............................................................107 BUILDING SCRIPTABLE OBJECTS (USING IDISPATCH) ...............................108 UNDERSTANDING DISPINTERFACES AND DISPIDS ................................................109 OBTAINING DISPIDS ..........................................................................................111 INVOKING THE MEMBER .............................................................................. .......111 THE VARIANT DATA TYPE ....................................................................................112 WORKING WITH VARIANTS (IN C++) ...................................................................114 WORKING WITH VARIANTS (IN VB 6.0) ...............................................................115 THE DISPPARAMS STRUCTURE ...........................................................................115 A C++ IDISPATCH EXAMPLE ...............................................................................116 A VISUAL BASIC IDISPATCH CLIENT ..............................................................117 UNDERSTANDING THE DUAL INTERFACE ...........................................................118 DEFINING A SCRIPTABLE OBJECT ....................................................................118 IMPLEMENTING ISCRIPTABLECAR ........................................................................119 BUILDING THE CLASS FACTORY .........................................................................123 UPDATING DLLGETCLASSOBJECT .........................................................................123 UPDATING THE SERVERS REGISTRATION FILE ............................................124 BUILDING A VBSCRIPT LATE-BOUND CLIENT .................................................124 SUMMARY ..................................................................................................................126 CHAPTER 3 A PRIMER ON COM PROGRAMMING FRAMEWORKS ............................................127 THE ROLE OF THE ACTIVE TEMPLATE LIBRARY ............................................127 GENERATING THE COMPONENT HOUSING ............................................................128 THE ATL PROJECT FILES....................................................................................... 129 INSERTING COM OBJECTS USING THE ATL OBJECT WIZARD.................................. 133 CODE UPDATES .................................................................................................. 135 ATLS IMPLEMENTATION OF YOUR COCLASS ...........................................................136 ATLS REGISTRATION SUPPORT ..............................................................................137 ADDING MEMBERS TO THE [DEFAULT] INTERFACE ..................................................140 ADDING A MORE INTERESTING METHOD ................................................................142 SUPPORTING ADDITIONAL COM INTERFACES .........................................................143 CONTENTS IX THE ROLE OF VISUAL BASIC 6.0 ....................................................................146 BUILDING COM SERVERS USING VISUAL BASIC 6.0 ...............................................146 DEFINING AUXILIARY INTERFACES ..........................................................................148 IMPLEMENTING INTERFACES IN VB 6.0 ................................................................149 SETTING BINARY COMPATIBILITY ..........................................................................151 VIEWING THE GENERATED IDL USING OLEVIEW.EXE ............................................152 MAKING USE OF YOUR COM SERVERS ..................................................................156 SUMMARY ..................................................................................................................159 CHAPTER 4 COM TYPE INFORMATION .................................................161 THE FORMAT OF A COM IDL FILE ....................................................................162 DEFINING COM TYPES ..........................................................................................163 PRIMITIVE COM DATA TYPES .............................................................................164 THE OLEAUTOMATION (AKA VARIANT) DATA TYPES ...............................................166 IDL METHOD PARAMETER ATTRIBUTES ..............................................................167 DEFINING COM INTERFACE TYPES IN IDL .....................................................171 DEFINING RAW DISPINTERFACES ..........................................................................171 DEFINING DUAL INTERFACES .............................................................................. ..172 BUILDING IUNKNOWN-DERIVED INTERFACES ........................................................173 COMMON IDL INTERFACE MODIFIERS .................................................................173 DEFINING COM CLASSES IN IDL .........................................................................174 DEFINING IDL ENUMERATIONS ...........................................................................176 DEFINING IDL STRUCTURES ..................................................................................176 COM STRING REPRESENTATION ...........................................................................177 COM (SAFE)ARRAY REPRESENTATION ...................................................................179 COM INTERFACE TYPES AS METHOD PARAMETERS ...............................................184 THE ITYPEINFO INTERFACE ...............................................................................185 A BRIEF WORD ON ITYPEINFO2 ............................................................................18 8 RELATED ITYPEINFO DATA TYPES .........................................................................188 GENERATING COM TYPE INFORMATION PROGRAMMATICALLY ........................189 A BRIEF WORD ON ICREATETYPELIB2 AND ICREATETYPEINFO2 .............................190 THE TARGET IDL .............................................................................. ...................190 BUILDING THE TYPE LIBRARY (ICREATETYPELIB) ......................................191 CREATING THE IHELLO INTERFACE ..................................................................193 BREAKING DOWN THE CREATEINTERFACE() HELPER METHOD .................................195 BUILDING THE SAYHELLO() METHOD ................................................................198 BUILDING THE HELLO COCLASS .........................................................................200 TESTING THE APPLICATION ...............................................................................201 CONTENTS X PROGRAMMATICALLY READING COM TYPE INFORMATION ...............................203 THE PROGRAM SKELETON .....................................................................................204 DISPLAYING COM LIBRARY INFORMATION ...........................................................205 DUMPING COM TYPE INFORMATION .................................................................207 LISTING COCLASS STATISTICS .............................................................................. ..208 LISTING IDISPATCH-BASED INTERFACE STATISTICS .................................................209 LISTING IUNKNOWN-BASED INTERFACE STATISTICS ................................................209 LISTING COM ENUMERATION STATISTICS .............................................................209 READING THE MYTYPELIB.TLB FILE ......................................................................210 DEFINING CUSTOM IDL ATTRIBUTES ................................................................212 READING CUSTOM ATTRIBUTES ............................................................................21 4 INTRODUCING THE SYSTEM.RUNTIME.INTEROPSERVICES NAMESPACE .......218 BUILDING A C# COM TYPE INFORMATION VIEWER ........................................220 LOADING THE COM TYPE LIBRARY ......................................................................221 LOADING THE COM TYPE LIBRARY ......................................................................222 DISPLAYING THE COM TYPES .............................................................................2 24 SUMMARY ..................................................................................................................228 CHAPTER 5 THE ANATOMY OF A .NET SERVER .............................229 THE PHILOSOPHY OF .NET .............................................................................. ...230 THE BUILDING BLOCKS OF .NET ......................................................................231 WORKING WITH MANAGED LANGUAGES ................................................................232 THE COMPOSITION OF A .NET BINARY ...........................................................233 BUILDING A C# CODE LIBRARY .........................................................................235 BUILDING THE ABSTRACT CAR TYPE .......................................................................238 BUILDING THE DERIVED MINIVAN TYPE ...............................................................240 IMPLEMENTING THE CONVERTIBLES .....................................................................240 ESTABLISHING THE ASSEMBLY MANIFEST ..............................................................242 INTRODUCING ILDASM.EXE .............................................................................. ...243 VIEWING THE ASSEMBLY MANIFEST .....................................................................243 VIEWING THE TYPE METADATA ............................................................................24 5 VIEWING (PARTIAL) METADATA FOR THE CARCOLOR ENUMERATION .........................246 VIEWING (PARTIAL) METADATA FOR THE ICONVERTIBLE INTERFACE ...........................247 VIEWING (PARTIAL) METADATA FOR A DERIVED TYPE .............................................247 REMAINING BITS OF INTERESTING METADATA ........................................................248 (NOT) VIEWING THE UNDERLYING IL CODE ..........................................................249 BUILDING A MANAGED CLIENT ...........................................................................250 CONFIGURING PRIVATE ASSEMBLIES .....................................................................251 SPECIFYING ARBITRARY ASSEMBLY LOCATIONS ............................................253 CONTENTS XI UNDERSTANDING THE SHARED ASSEMBLY .........................................................254 GENERATING A STRONGLY NAMED ASSEMBLY .......................................................255 PREPPING THE PROJECT WORKSPACE ....................................................................257 BUILDING THE AIR VEHICLES .............................................................................. ...258 GENERATING THE STRONG NAME ..........................................................................260 USING THE SHARED ASSEMBLY ...........................................................................262 VERSIONING SHARED ASSEMBLIES ....................................................................264 VERSIONING THE SHARED VB .NET AIRVEHICLES ASSEMBLY .................................265 WORKING WITH PUBLISHER POLICY ASSEMBLIES ..........................................267 THE BINDING PROCESS IN A NUTSHELL .................................................................269 AND NOW FOR SOMETHING COMPLETELY DIFFERENT: SYSTEM.CODEDOM ...270 SYSTEM.CODEDOM: ITS MEANING IN LIFE .........................................................272 INTRODUCING THE SYSTEM.CODEDOM NAMESPACE ..........................................272 THE TYPES OF SYSTEM.CODEDOM .....................................................................274 BUILDING A CODEDOM EXAMPLE ......................................................................276 BUILDING THE MAIN() FUNCTION .........................................................................277 BUILDING THE FILE VIA CREATEFILE() ....................................................................280 BUILDING THE HELLOCLASS (AND CONTAINING NAMESPACE) ................................281 COMPILING THE ASSEMBLY .............................................................................. ...284 RUNNING THE ASSEMBLY (USING LATE BINDING) ................................................285 RUNNING YOUR APPLICATION .............................................................................. 285 SUMMARY ..................................................................................................................288 CHAPTER 6 .NET TYPES ...........................................................................289 THE ROLE OF SYSTEM.OBJECT ...........................................................................289 OVERRIDING TOSTRING() .............................................................................. ........290 THE TWO FACES OF EQUALITY .............................................................................. 292 EXAMINING THE .NET DATA TYPE SYSTEM .....................................................294 SYSTEM DATA TYPE LANGUAGE MAPPINGS .........................................................296 THE SET OF CUSTOM .NET TYPES ....................................................................297 .NET CLASS TYPES .............................................................................. ...............299 .NET STRUCTURE TYPES .............................................................................. ........300 .NET INTERFACE TYPES .............................................................................. .........301 .NET ENUMERATION TYPES ................................................................................301 BUILDING A COMPLEX CODE LIBRARY ..............................................................302 UNDERSTANDING REFLECTION .............................................................................304 WORKING WITH SYSTEM.TYPE .............................................................................304 OBTAINING A TYPE REFERENCE USING SYSTEM.OBJECT.GETTYPE() ......................306 OBTAINING A TYPE REFERENCE USING THE C# TYPEOF OPERATOR .........................306 OBTAINING A TYPE REFERENCE USING THE TYPE CLASS ........................................307 THE SYSTEM.REFLECTION NAMESPACE ..............................................................309 CONTENTS XII DYNAMICALLY LOADING AN ASSEMBLY ..............................................................310 ENUMERATING TYPES IN A REFERENCED ASSEMBLY .............................................311 ENUMERATING CLASS MEMBERS .........................................................................311 ENUMERATING METHOD PARAMETERS .................................................................311 BUILDING A CUSTOM .NET TYPE VIEWER .......................................................312 SHOWING SELECTED TYPE DETAILS .......................................................................315 BUILDING THE MORE DETAILS MENU ....................................................................316 A BRIEF WORD REGARDING SYSTEM.REFLECTION.EMIT ...............................323 UNDERSTANDING .NET ATTRIBUTES ..................................................................323 CREATING AND APPLYING CUSTOM ATTRIBUTES ............................................325 VIEWING THE APPLIED METADATA .......................................................................326 RESTRICTING ATTRIBUTE USAGE ............................................................................32 7 ASSEMBLY- (AND MODULE-) LEVEL ATTRIBUTES ...................................................328 READING ATTRIBUTES AT RUNTIME ..................................................................330 LATE BINDING UNDER THE .NET PLATFORM .........................................................331 THE ACTIVATOR CLASS ..........................................................................................331 LATE BINDING TO A PRIVATE ASSEMBLY ...............................................................332 INVOKING PARAMETERIZED METHODS ..................................................................334 BINDING LATE TO SHARED ASSEMBLIES .........................................................335 CONTRASTING COM AND .NET LATE-BINDING SYNTAX ........................................336 SUMMARY ..................................................................................................................338 CHAPTER 7 .NET-TO-COM INTEROPERABILITY* THE BASICS ...........................................................................339 A HIGH-LEVEL OVERVIEW OF .NET-TO-COM INTEROPERABILITY ..............339 UNDERSTANDING THE ROLE OF THE RCW ..............................................................340 BUILDING AN INTEROP ASSEMBLYTHE SIMPLEST POSSIBLE EXAMPLE ...342 A VISUAL BASIC .NET CLIENT .............................................................................. 346 CONVERTING BETWEEN COM IDL DATA TYPES AND MANAGED DATA TYPES .............................................................................. ...346 WORKING WITH MANAGED GUIDS (SYSTEM.GUID) .............................................348 BLITTABLE AND NON-BLITTABLE DATA TYPES .........................................................349 INTERFACES CONSUMED BY THE RCW ................................................................351 OPTIONS TO OBTAIN AN INTEROP ASSEMBLY .................................................353 USING THE TLBIMP.EXE COMMAND LINE UTILITY ................................................353 EXAMINING THE GENERATED .NET TYPES .......................................................356 MANIPULATING COM TYPES USING GENERATED -CLASS* TYPES ........................357 MANIPULATING COM TYPES USING DISCRETE INTERFACES ...................................358 MANIPULATING COM TYPES USING THE [DEFAULT] INTERFACE TYPE ....................361 CONTENTS XIII CONTENTS XIV SELECT MEMBERS OF THE SYSTEM.RUNTIME.INTEROPSERVICES NAMESPACE ......................................362 AN INTERESTING ASIDE: SYSTEM.RUNTIME.INTEROPSERVICES.RUNTIMEENVIRONMENT ............................366 COM LIBRARY STATEMENT TO .NET ASSEMBLY STATEMENT CONVERSION RULES .................................................367 PROGRAMMATICALLY CONTROLLING THE NAMESPACE DEFINITION ..........................369 COM TYPES TO .NET TYPES CONVERSION RULES ..........................................371 COM INTERFACE CONVERSION .............................................................................371 COM INTERFACE MEMBERS TO .NET METHOD CONVERSION RULES .....................375 COM METHOD PARAMETERS TO .NET METHOD PARAMETERS CONVERSION RULES ........................................................................377 HANDLING OPTIONAL AND DEFAULT PARAMETERS .................................................381 COM COCLASS CONVERSION .............................................................................. .385 MAPPING [NONCREATABLE] AND [APPOBJECT] COCLASSES ....................................387 CATALOGING COM DISPIDS ...............................................................................388 ADDITIONAL COCLASS TO .NET CLASS INFRASTRUCTURE ...........................................389 COM ENUM CONVERSION ..................................................................................391 DEPLOYING INTEROP ASSEMBLIES ....................................................................392 CREATING A PRIMARY INTEROP ASSEMBLY .....................................................393 REFLECTING ON INTEROP ASSEMBLY ATTRIBUTES ........................................396 OBTAINING TYPE INFORMATION FOR A COM WRAPPER TYPE ................................398 THE ROLE OF SYSTEM.__COMOBJECT ..................................................................399 INTERACTING WITH WELL-KNOWN COM SERVERS ............................................399 SUMMARY ..................................................................................................................402 CHAPTER 8 .NET-TO-COM INTEROPERABILITY* INTERMEDIATE TOPICS ....................................................403 HANDLING THE COM VARIANT .............................................................................403 BUILDING A VARIANT-CENTRIC COM SERVER .................................................405 EXERCISING COM VARIANTS FROM MANAGED CODE .........................................407 THE VARIANT WRAPPERS .............................................................................. ....409 HANDLING COM SAFEARRAYS ...............................................................................410 EXERCISING COM SAFEARRAYS FROM MANAGED CODE ....................................413 RECEIVING SAFEARRAYS ...................................................................................416 HANDLING C-STYLE ARRAYS ...............................................................................419 HANDLING COM PARAM ARRAYS ...........................................................................420 HANDLING COM STRUCTURES ...............................................................................421 BUILDING A VB 6.0 STRUCTURE SERVER .................................................................423 EXERCISING COM STRUCTURES FROM MANAGED CODE .........................................424 HANDLING COM COLLECTIONS .............................................................................426 EXERCISING THE COM COLLECTION FROM MANAGED CODE ..................................433 CONTENTS XV A BRIEF REVIEW OF COM CONNECTION POINTS (COM EVENTS) ................437 UNDERSTANDING ICONNECTIONPOINTCONTAINER ................................................437 UNDERSTANDING ICONNECTIONPOINT .................................................................438 UNDERSTANDING THE OUTBOUND INTERFACE .......................................................439 ALL TOGETHER NOW ... ..........................................................................................440 BUILDING A CONNECTABLE COM TYPE ..............................................................441 A BRIEF REVIEW OF .NET DELEGATES ...........................................................443 A BRIEF REVIEW OF .NET EVENTS ..................................................................445 EXAMINING THE INTEROP ASSEMBLY ................................................................448 EXAMINING THE GENERATED DELEGATES .............................................................450 EXAMINING THE GENERATED __COCAR AND __COCAR_EVENT INTERFACES ...........451 EXAMINING THE MANAGED COCLASS ..................................................................453 RECEIVING THE COM EVENTS (C#) .....................................................................455 RECEIVING THE COM EVENTS (VB .NET) ...........................................................456 HANDLING COM TYPES WITH MULTIPLE [SOURCE] INTERFACES ..............................457 HANDLING COM ERROR OBJECTS .........................................................................459 MANIPULATING COM ERROR OBJECTS IN COM ....................................................461 THE ROLE OF ISUPPORTERRORINFO .......................................................................462 BUILDING A SIMPLE ATL ERROR SERVER ...............................................................462 THE .NET ERROR HANDLING MECHANISM .........................................................464 THE COMEXCEPTION TYPE ................................................................................466 HANDLING COM ERROR INFORMATION FROM MANAGED CODE .............................466 DEBUGGING COM SERVERS USING VS .NET .....................................................468 SUMMARY ..................................................................................................................470 CHAPTER 9 .NET-TO-COM INTEROPERABILITY* ADVANCED TOPICS ..............................................................471 REVISITING THE MARSHAL CLASS ....................................................................471 DIRECTLY INTERACTING WITH IUNKNOWN ..............................................................473 MANUALLY DESTROYING A COM OBJECT ..............................................................474 COM COCLASSES IMPLEMENTING .NET INTERFACES ......................................475 BUILDING A COMPARABLE COM CLASS ...............................................................476 BUILDING A CLONEABLE COM TYPE ....................................................................480 BUILDING .NET TYPE COMPATIBLE COCLASSES USING ATL 3.0 ...........................481 GUIDELINES FOR BUILDING .NET TYPE COMPATIBLE COM CLASSES .......484 GUIDELINE #1: DONT INDIRECTLY IMPLEMENT THE SAME INTERFACE TWICE .........485 GUIDELINE #2: DONT IMPLEMENT .NET CLASS INTERFACES .................................485 GUIDELINE #3: TAKE CARE WHEN IMPLEMENTING INTERFACE HIERARCHIES ..........487 GUIDELINE #4: VB 6.0 HAS A KEY LIMITATION (IMAGINE THAT . . .) .....................489 CONSUMING ACTIVEX CONTROLS FROM MANAGED CODE .................................490 BUILDING AN EXAMPLE ACTIVEX CONTROL ...........................................................490 VIEWING THE GENERATED IDL ............................................................................49 3 OPTIONS FOR CONSUMING ACTIVEX CONTROLS FROM MANAGED CODE .......495 CONSUMING AN ACTIVEX CONTROL USING THE VS .NET IDE ...............................495 IMPORTING ACTIVEX CONTROLS USING AXIMP.EXE ..............................................501 MODIFYING THE CODE FOR THE AXHOST-DERIVED TYPE .............................504 ONE FINAL MODIFICATION ...................................................................................506 MANUALLY MODIFYING INTEROP ASSEMBLIES .................................................508 BUILDING AN EXAMPLE COM SERVER .................................................................509 UNDERSTANDING THE INTEROP EDITING PROCESS ........................................510 GENERATING THE INITIAL INTEROP ASSEMBLY .......................................................511 OBTAINING THE .IL FILE FOR INTEROP.HELPFULATLSERVER.DLL ...............................512 VIEWING THE ORIGINAL IL/METADATA DEFINITIONS .............................................514 DISSECTING THE LAYOUT OF ATTRIBUTE METADATA ...................................517 BUILDING A SCRATCH* ASSEMBLY ..................................................................519 CREATING A .NET [CUSTOM] WRAPPER ................................................................519 UPDATING THE INTEROP ASSEMBLY .....................................................................522 RECOMPILING THE IL ..........................................................................................524 BUILDING THE MANAGED CLIENT ......................................................................526 BUILDING A CUSTOM TYPE LIBRARY IMPORTER UTILITY ...........................528 UNDERSTANDING THE TYPELIBCONVERTER CLASS .................................................528 BUILDING THE MAIN SHELL ...............................................................................530 PROGRAMMATICALLY LOADING THE COM TYPE INFORMATION ..............................531 DISSECTING THE TYPELIBCONVERTER.CONVERTTYPELIBTOASSEMBLY() METHOD .............................................................................................................533 BUILDING THE HELPER SINK .................................................................................535 IMPLEMENTING MYTLBIMPAPP.GENERATEASSEMBLYFROMTYPELIB() ..............536 SUMMARY ..................................................................................................................538 CHAPTER 10 COM-TO-.NET INTEROPERABILITY* THE BASICS ...........................................................................539 THE ROLE OF THE CCW ........................................................................................539 THE CCW: MAPPING .NET DATA TYPES INTO COM IDL DATA TYPES ................540 THE CCW: SIMULATING IMPLEMENTED COM INTERFACES ..................................542 THE CCW: SIMULATING COM IDENTITY ..............................................................543 CORE REQUIREMENTS FOR COM-TO-.NET COMMUNICATIONS ........................544 GENERATING COM TYPE DEFINITIONS ................................................................545 REGISTERING THE .NET ASSEMBLY WITH COM ....................................................545 USING THE TLBEXP.EXE UTILITY ....................................................................546 CONTENTS XVI GENERAL GUIDELINES FOR BUILDING COM-AWARE .NET TYPES ................547 ESTABLISHING TYPE VISIBILITY .............................................................................547 ESTABLISHING TYPE MEMBER VISIBILITY .............................................................548 CONTROLLING TYPE AND MEMBER VISIBILITY USING THE COMVISIBLE ATTRIBUTE ..548 TRANSLATING CONSTRUCTORS AND C#-STYLE DESTRUCTORS .....................................549 TRANSLATING ABSTRACT BASE CLASSES ..................................................................551 TRANSLATING OVERRIDABLE MEMBERS .................................................................551 INHERITING PUBLIC MEMBERS ............................................................................55 3 TRANSLATING STATIC AND CONSTANT MEMBERS ....................................................554 CRITICAL .NET-TO-COM CONVERSION DETAILS ............................................554 CONVERTING METHOD SIGNATURES ......................................................................555 CONVERTING .NET PROPERTIES ...........................................................................556 CONVERTING .NET FIELDS ...................................................................................557 UNDERSTANDING THE CLASS INTERFACE .........................................................557 ESTABLISHING A .NET CLASS INTERFACE ...............................................................559 THE CUSTOM IDL ATTRIBUTE: {0F21F359-AB84-41E8-9A78-36D110E6D2F9} ..............................................561 UNDERSTANDING THE OBJECT INTERFACE .......................................................562 TRANSFORMING SYSTEM.OBJECT.TOSTRING() ........................................................563 THE CASE AGAINST CLASS INTERFACES .........................................................563 EXPOSING CUSTOM .NET INTERFACES TO COM ..............................................564 CONTROLLING IID AND DISPID GENERATION .......................................................566 IMPLEMENTING EXPLICIT INTERFACES ...........................................................567 CONTROLLING THE GENERATED PROGID ...........................................................567 CONTROLLING THE COM LIBRARY DEFINITION ..............................................568 HANDLING OVERLOADED METHODS ......................................................................569 IMPORTING MSCORLIB.TLB .............................................................................. ...570 USING THE REGASM.EXE UTILITY ....................................................................572 EXAMINING THE UPDATED ENTRIES ..................................................................574 THE PROGID ENTRY .............................................................................................575 THE HKCR CLSID ENTRY ..................................................................................575 ENLISTING .NET TYPES INTO A SPECIFIC COM CATEGORY ....................................577 REGISTERING THE EXPOSED INTERFACES ................................................................579 REGISTERING THE COM TYPE LIBRARY .................................................................582 DEPLOYING THE .NET ASSEMBLY ......................................................................582 LEVERAGING THE VISUAL STUDIO .NET IDE .................................................584 BUILDING A VISUAL BASIC 6.0 COM CLIENT ..............................................584 INTERACTING WITH MSCORLIB.TLB ..........................................................................586 BUILDING A C++ COM CLIENT ...........................................................................589 BUILDING A VBSCRIPT COM CLIENT ................................................................590 SUMMARY ..................................................................................................................591 CONTENTS XVII CHAPTER 11 COM-TO-.NET INTEROPERABILITY* INTERMEDIATE TOPICS ....................................................593 CONVERTING .NET ENUMS TO COM ENUMS .......................................................593 ALTERING THE UNDERLYING FIELD STORAGE ...........................................................595 LEVERAGING SYSTEM.ENUM? ..............................................................................597 CONVERTING .NET STRUCTURES TO COM STRUCTURES .................................598 EXPOSING A .NET STRUCTURE AS AN IDL UNION .................................................603 CONVERTING .NET DELEGATES TO COM CONNECTION POINTS ....................604 CREATING THE EVENT INTERFACE ...........................................................................605 SPECIFYING THE EVENT INTERFACES (A LA COMSOURCEINTERFACESATTRIBUTE) ........606 ESTABLISHING MULTIPLE [SOURCE] INTERFACES ......................................................607 BUILDING A .NET EVENT SERVER USING VB .NET ......................................608 BUILDING A VISUAL BASIC 6.0 EVENT CLIENT ..........................................609 BUILDING A C++ EVENT CLIENT ......................................................................610 BUILDING THE CLIENT-SIDE SINK .........................................................................611 EXPOSING CUSTOM .NET COLLECTIONS ...........................................................614 A VB 6.0 .NET COLLECTION CLIENT ......................................................................617 EXPOSING .NET EXCEPTIONS .............................................................................619 THROWING CUSTOM .NET EXCEPTIONS ...............................................................620 EXERCISING YOUR DOTNETCOLLECTION ASSEMBLY FROM C++ ....................621 CONVERTING .NET INTERFACE WITH MULTIPLE BASE INTERFACES .........624 CONVERTING .NET INTERFACE HIERARCHIES .................................................627 SUMMARY ..................................................................................................................630 CHAPTER 12 COM-TO-.NET INTEROPERABILITY* ADVANCED TOPICS ..............................................................633 CHANGING TYPE MARSHALING USING MARSHALASATTRIBUTE ......................633 .NET TYPES IMPLEMENTING COM INTERFACES ..............................................638 DEFINING CUSTOM COM INTERFACES ................................................................638 BUILDING AND DEPLOYING THE INTEROP ASSEMBLY .............................................640 BUILDING A BINARY-COMPATIBLE C# TYPE .........................................................641 BUILDING A BINARY-COMPATIBLE VB .NET TYPE ................................................642 REGISTERING THE .NET ASSEMBLIES WITH COM .................................................644 BUILDING A VB 6.0 COM CLIENT ....................................................................644 DEFINING COM INTERFACES USING MANAGED CODE ......................................646 SELECTED NOTES ON MANUALLY DEFINING COM INTERFACES USING MANAGED CODE ....................................................................649 MANUALLY DEFINING COM ATOMS: AN EXTENDED EXAMPLE ........................650 DEFINING THE DUAL INTERFACE (AND SHAPECOLOR ENUM) USING C# .............651 CONTENTS XVIII INTERACTING WITH INTEROP ASSEMBLY REGISTRATION .............................653 INSERTING CUSTOM REGISTRATION INFORMATION .................................................654 PROGRAMMATICALLY CONVERTING ASSEMBLIES TO COM TYPE INFORMATION ...........................................................................655 HOSTING THE .NET RUNTIME FROM AN UNMANAGED ENVIRONMENT ...........660 BUILDING A CUSTOM HOST ..................................................................................663 SUMMARY ..................................................................................................................667 CHAPTER 13 BUILDING SERVICED COMPONENTS (COM+ INTEROP) .................................................................669 THE MTS, COM+, COMPONENT SERVICES NAME GAME ...................................669 RECAPPING COMPONENT SERVICES ....................................................................670 REVIEWING THE COM+ RUNTIME ENVIRONMENT ..............................................672 REVIEWING OBJECT CONTEXT .............................................................................. 673 REVIEWING CALL CONTEXT .............................................................................. .....674 THE ROLE OF THE COM+ CATALOG ....................................................................675 THE COMPONENT SERVICE EXPLORER ................................................................678 CREATING COM+ APPLICATIONS .........................................................................679 A CLASSIC COM+ EXAMPLE .............................................................................. ...682 BUILDING A VB 6.0 COM+ CLIENT ..................................................................683 DEPLOYING COM+ APPLICATIONS ......................................................................685 THE SYSTEM.ENTERPRISESERVICES NAMESPACE ............................................687 THE SYSTEM.ENTERPRISESERVICES.SERVICEDCOMPONENT TYPE .........................689 THE SIMPLEST POSSIBLE EXAMPLE ..................................................................690 INSTALLING THE CODE LIBRARY .............................................................................693 USING THE REGSVCS.EXE COMMAND LINE UTILITY ......................................694 VIEWING THE GENERATED TYPE COM INFORMATION ...........................................695 ACKNOWLEDGING THE REGISTRATION ENTRIES .......................................................696 AND FINALLY, THE COM+ APPLICATION ITSELF ......................................................697 ACCESSING THE CONFIGURED .NET COMPONENT FROM VB 6.0 ..................698 ACCESSING THE CONFIGURED .NET COMPONENT FROM C# ...........................699 ENABLING COMPONENT STATISTICS ..................................................................699 A BRIEF WORD ON LAZY (AUTOMATIC) REGISTRATION ...............................700 WORKING WITH THE REGISTRATIONHELPER TYPE ..........................................701 CONFIGURING A MANAGED COM+ APPLICATION USING .NET ATTRIBUTES .....................................................703 SUPPORTING OBJECT CONSTRUCTION STRINGS ..............................................704 EXAMINING THE CONTEXTUTIL TYPE ................................................................706 CONTENTS XIX UNDERSTANDING JITA ..........................................................................................708 THE HAPPY AND DONE BITS ........................................................................709 ENABLING JITA/ASAP DEACTIVATION .................................................................710 CONTROLLING THE DONE BIT .................................................................................712 JITA AND IMPLEMENTING IOBJECTCONTROL (SO TO SPEAK*) .............................713 JITA, IOBJECTCONTROL, AND THE .NET GARBAGE COLLECTOR ................714 CONFIGURING POOLABLE OBJECTS ....................................................................715 A RECAP OF TRANSACTIONAL PROGRAMMING ...................................................717 ROOT OBJECTS, SECONDARY OBJECTS, AND COM+ TRANSACTIONS ........................718 PROGRAMMING COM+ TRANSACTIONS ..................................................................720 SETTING THE HAPPY BIT .............................................................................. ........722 A COMPLETE SERVICED COMPONENT EXAMPLE .................................................724 BUILDING THE CUSTOM DATABASE ......................................................................725 BUILDING THE C# CODE LIBRARY .........................................................................726 BUILDING THE LOGSALE TYPE .............................................................................. 727 BUILDING THE CARINVENTORY CLASS TYPE ...........................................................728 BUILDING THE WINDOWS FORMS FRONT END .......................................................732 BUILDING AN ASP.NET WEB SERVICE CLIENT .......................................................734 FINAL THOUGHTS REGARDING SYSTEM.ENTERPRISESERVICES ....................736 SUMMARY ..................................................................................................................738 INDEX .............................................................................. ......................................739 CONTENTS XX
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spelling	Troelsen, Andrew Verfasser aut COM and .NET interoperability Andrew Troelsen Berkeley, CA Apress 2002 XXIX, 769 S. Ill. txt rdacontent n rdamedia nc rdacarrier Intertech instructor series .Net developer series COM (Computer architecture) Computer software Development Microsoft .NET Framework Object-oriented programming (Computer science) SWB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=009816495&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis
spellingShingle	Troelsen, Andrew COM and .NET interoperability COM (Computer architecture) Computer software Development Microsoft .NET Framework Object-oriented programming (Computer science)
title	COM and .NET interoperability
title_auth	COM and .NET interoperability
title_exact_search	COM and .NET interoperability
title_full	COM and .NET interoperability Andrew Troelsen
title_fullStr	COM and .NET interoperability Andrew Troelsen
title_full_unstemmed	COM and .NET interoperability Andrew Troelsen
title_short	COM and .NET interoperability
title_sort	com and net interoperability
topic	COM (Computer architecture) Computer software Development Microsoft .NET Framework Object-oriented programming (Computer science)
topic_facet	COM (Computer architecture) Computer software Development Microsoft .NET Framework Object-oriented programming (Computer science)
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