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Understanding The COM Single-Threaded Apartment Part 1

, 6 Jan 2005 CPOL
Learn the fundamental principles of the COM Single-Threaded Apartment Model by code examples.
ccomthread_src.zip
LegacyCOMObject1
Shared
SimpleCOMObject1
SimpleCOMObject2
Test Programs
LegacyCOMObject1.def
LegacyCOMObject1.dsp
LegacyCOMObject1.dsw
LegacyCOMObject1.rgs
LegacyCOMObject1.tlb
LegacyCOMObject1ps.def
LegacyCOMObject1ps.mk
SimpleCOMObject1.def
SimpleCOMObject1.dsp
SimpleCOMObject1.dsw
SimpleCOMObject1.rgs
SimpleCOMObject1.tlb
SimpleCOMObject1ps.def
SimpleCOMObject1ps.mk
SimpleCOMObject2.def
SimpleCOMObject2.dsp
SimpleCOMObject2.dsw
SimpleCOMObject2.rgs
SimpleCOMObject2.tlb
SimpleCOMObject2ps.def
SimpleCOMObject2ps.mk
VBTest
VCTests
FormMain.frm
MSSCCPRJ.SCC
VBTest.exe
VBTest.vbp
VBTest.vbw
DemonstrateDefaultSTA
DemonstrateExeServerSTA
DemonstrateLegacySTA
DemonstrateNoMessageLoop
DemonstrateSTA
VCTest01
VCTest02
SimpleCOMObject2.tlh
SimpleCOMObject2.tli
VCTest01.dsp
VCTest01.dsw
SimpleCOMObject2.tlh
SimpleCOMObject2.tli
VCTest02.dsp
VCTest02.dsw
Client
Implementation
Interface
VCTest01
VCTest01.dsp
VCTest01.dsw
ExeServerImpl
ExeServerImpl.dsp
ExeServerImpl.dsw
ExeServerInterfaces
ExeObj01.rgs
ExeObj02.rgs
ExeObj03.rgs
ExeServerInterfaces.def
ExeServerInterfaces.dsp
ExeServerInterfaces.dsw
ExeServerInterfaces.tlb
ExeServerInterfacesps.def
ExeServerInterfacesps.mk
VCTest01
VCTest02
LegacyCOMObject1.tlh
LegacyCOMObject1.tli
VCTest01.dsp
VCTest01.dsw
VCTest02.dsp
VCTest02.dsw
VCTest01
SimpleCOMObject2.tlh
SimpleCOMObject2.tli
VCTest01.dsp
VCTest01.dsw
VCTest01
SimpleCOMObject2.tlh
SimpleCOMObject2.tli
VCTest01.dsp
VCTest01.dsw
/* this ALWAYS GENERATED file contains the proxy stub code */


/* File created by MIDL compiler version 5.01.0164 */
/* at Wed Dec 29 16:46:00 2004
 */
/* Compiler settings for F:\Limbl\Develope\CodeProject\CCOMThread\Test Programs\VCTests\DemonstrateExeServerSTA\Interface\ExeServerInterfaces\ExeServerInterfaces.idl:
    Oicf (OptLev=i2), W1, Zp8, env=Win32, ms_ext, c_ext
    error checks: allocation ref bounds_check enum stub_data 
*/
//@@MIDL_FILE_HEADING(  )

#define USE_STUBLESS_PROXY


/* verify that the <rpcproxy.h> version is high enough to compile this file*/
#ifndef __REDQ_RPCPROXY_H_VERSION__
#define __REQUIRED_RPCPROXY_H_VERSION__ 440
#endif


#include "rpcproxy.h"
#ifndef __RPCPROXY_H_VERSION__
#error this stub requires an updated version of <rpcproxy.h>
#endif // __RPCPROXY_H_VERSION__


#include "ExeServerInterfaces.h"

#define TYPE_FORMAT_STRING_SIZE   3                                 
#define PROC_FORMAT_STRING_SIZE   23                                

typedef struct _MIDL_TYPE_FORMAT_STRING
    {
    short          Pad;
    unsigned char  Format[ TYPE_FORMAT_STRING_SIZE ];
    } MIDL_TYPE_FORMAT_STRING;

typedef struct _MIDL_PROC_FORMAT_STRING
    {
    short          Pad;
    unsigned char  Format[ PROC_FORMAT_STRING_SIZE ];
    } MIDL_PROC_FORMAT_STRING;


extern const MIDL_TYPE_FORMAT_STRING __MIDL_TypeFormatString;
extern const MIDL_PROC_FORMAT_STRING __MIDL_ProcFormatString;


/* Object interface: IUnknown, ver. 0.0,
   GUID={0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}} */


/* Object interface: IDispatch, ver. 0.0,
   GUID={0x00020400,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}} */


/* Object interface: IExeObj01, ver. 0.0,
   GUID={0xFF28C486,0x518D,0x4EA2,{0x9E,0x0E,0xFE,0x4F,0x9E,0x79,0x1C,0x9C}} */


extern const MIDL_STUB_DESC Object_StubDesc;


extern const MIDL_SERVER_INFO IExeObj01_ServerInfo;

#pragma code_seg(".orpc")

static const MIDL_STUB_DESC Object_StubDesc = 
    {
    0,
    NdrOleAllocate,
    NdrOleFree,
    0,
    0,
    0,
    0,
    0,
    __MIDL_TypeFormatString.Format,
    1, /* -error bounds_check flag */
    0x20000, /* Ndr library version */
    0,
    0x50100a4, /* MIDL Version 5.1.164 */
    0,
    0,
    0,  /* notify & notify_flag routine table */
    1,  /* Flags */
    0,  /* Reserved3 */
    0,  /* Reserved4 */
    0   /* Reserved5 */
    };

static const unsigned short IExeObj01_FormatStringOffsetTable[] = 
    {
    (unsigned short) -1,
    (unsigned short) -1,
    (unsigned short) -1,
    (unsigned short) -1,
    0
    };

static const MIDL_SERVER_INFO IExeObj01_ServerInfo = 
    {
    &Object_StubDesc,
    0,
    __MIDL_ProcFormatString.Format,
    &IExeObj01_FormatStringOffsetTable[-3],
    0,
    0,
    0,
    0
    };

static const MIDL_STUBLESS_PROXY_INFO IExeObj01_ProxyInfo =
    {
    &Object_StubDesc,
    __MIDL_ProcFormatString.Format,
    &IExeObj01_FormatStringOffsetTable[-3],
    0,
    0,
    0
    };

CINTERFACE_PROXY_VTABLE(8) _IExeObj01ProxyVtbl = 
{
    &IExeObj01_ProxyInfo,
    &IID_IExeObj01,
    IUnknown_QueryInterface_Proxy,
    IUnknown_AddRef_Proxy,
    IUnknown_Release_Proxy ,
    0 /* (void *)-1 /* IDispatch::GetTypeInfoCount */ ,
    0 /* (void *)-1 /* IDispatch::GetTypeInfo */ ,
    0 /* (void *)-1 /* IDispatch::GetIDsOfNames */ ,
    0 /* IDispatch_Invoke_Proxy */ ,
    (void *)-1 /* IExeObj01::TestMethod1 */
};


static const PRPC_STUB_FUNCTION IExeObj01_table[] =
{
    STUB_FORWARDING_FUNCTION,
    STUB_FORWARDING_FUNCTION,
    STUB_FORWARDING_FUNCTION,
    STUB_FORWARDING_FUNCTION,
    NdrStubCall2
};

CInterfaceStubVtbl _IExeObj01StubVtbl =
{
    &IID_IExeObj01,
    &IExeObj01_ServerInfo,
    8,
    &IExeObj01_table[-3],
    CStdStubBuffer_DELEGATING_METHODS
};

#pragma data_seg(".rdata")

#if !defined(__RPC_WIN32__)
#error  Invalid build platform for this stub.
#endif

#if !(TARGET_IS_NT40_OR_LATER)
#error You need a Windows NT 4.0 or later to run this stub because it uses these features:
#error   -Oif or -Oicf, more than 32 methods in the interface.
#error However, your C/C++ compilation flags indicate you intend to run this app on earlier systems.
#error This app will die there with the RPC_X_WRONG_STUB_VERSION error.
#endif


static const MIDL_PROC_FORMAT_STRING __MIDL_ProcFormatString =
    {
        0,
        {

	/* Procedure TestMethod1 */

			0x33,		/* FC_AUTO_HANDLE */
			0x6c,		/* Old Flags:  object, Oi2 */
/*  2 */	NdrFcLong( 0x0 ),	/* 0 */
/*  6 */	NdrFcShort( 0x7 ),	/* 7 */
#ifndef _ALPHA_
/*  8 */	NdrFcShort( 0x8 ),	/* x86, MIPS, PPC Stack size/offset = 8 */
#else
			NdrFcShort( 0x10 ),	/* Alpha Stack size/offset = 16 */
#endif
/* 10 */	NdrFcShort( 0x0 ),	/* 0 */
/* 12 */	NdrFcShort( 0x8 ),	/* 8 */
/* 14 */	0x4,		/* Oi2 Flags:  has return, */
			0x1,		/* 1 */

	/* Return value */

/* 16 */	NdrFcShort( 0x70 ),	/* Flags:  out, return, base type, */
#ifndef _ALPHA_
/* 18 */	NdrFcShort( 0x4 ),	/* x86, MIPS, PPC Stack size/offset = 4 */
#else
			NdrFcShort( 0x8 ),	/* Alpha Stack size/offset = 8 */
#endif
/* 20 */	0x8,		/* FC_LONG */
			0x0,		/* 0 */

			0x0
        }
    };

static const MIDL_TYPE_FORMAT_STRING __MIDL_TypeFormatString =
    {
        0,
        {
			NdrFcShort( 0x0 ),	/* 0 */

			0x0
        }
    };

const CInterfaceProxyVtbl * _ExeServerInterfaces_ProxyVtblList[] = 
{
    ( CInterfaceProxyVtbl *) &_IExeObj01ProxyVtbl,
    0
};

const CInterfaceStubVtbl * _ExeServerInterfaces_StubVtblList[] = 
{
    ( CInterfaceStubVtbl *) &_IExeObj01StubVtbl,
    0
};

PCInterfaceName const _ExeServerInterfaces_InterfaceNamesList[] = 
{
    "IExeObj01",
    0
};

const IID *  _ExeServerInterfaces_BaseIIDList[] = 
{
    &IID_IDispatch,
    0
};


#define _ExeServerInterfaces_CHECK_IID(n)	IID_GENERIC_CHECK_IID( _ExeServerInterfaces, pIID, n)

int __stdcall _ExeServerInterfaces_IID_Lookup( const IID * pIID, int * pIndex )
{
    
    if(!_ExeServerInterfaces_CHECK_IID(0))
        {
        *pIndex = 0;
        return 1;
        }

    return 0;
}

const ExtendedProxyFileInfo ExeServerInterfaces_ProxyFileInfo = 
{
    (PCInterfaceProxyVtblList *) & _ExeServerInterfaces_ProxyVtblList,
    (PCInterfaceStubVtblList *) & _ExeServerInterfaces_StubVtblList,
    (const PCInterfaceName * ) & _ExeServerInterfaces_InterfaceNamesList,
    (const IID ** ) & _ExeServerInterfaces_BaseIIDList,
    & _ExeServerInterfaces_IID_Lookup, 
    1,
    2,
    0, /* table of [async_uuid] interfaces */
    0, /* Filler1 */
    0, /* Filler2 */
    0  /* Filler3 */
};

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Lim Bio Liong
Web Developer
Singapore Singapore
Lim Bio Liong is a Specialist at a leading Software House in Singapore.
 
Bio has been in software development for over 10 years. He specialises in C/C++ programming and Windows software development.
 
Bio has also done device-driver development and enjoys low-level programming. Bio has recently picked up C# programming and has been researching in this area.

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