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Building COM Servers in .NET

, 2 Feb 2006
Learn the fundamental principles of building COM DLL and EXE Servers using a .NET language.
buildcomserversindotnet_src.zip
SimpleCOMObject
CSharpExeCOMServers
interfaces
implementations
clients
SimpleCOMObject
SimpleCOMObject.def
SimpleCOMObject.rgs
SimpleCOMObject.snk
SimpleCOMObject1.rgs
SimpleCOMObjectps.def
SimpleCOMObject.vcproj.vspscc
SimpleCOMObjectPS.vcproj.vspscc
Interop.SimpleCOMObject.dll
CPP
C#
SimpleCOMObject_CPPImpl
SimpleCOMObject_CPPImpl.def
SimpleCOMObject_CPPImpl.rgs
SimpleCOMObject_CPPImpl1.rgs
SimpleCOMObject_CPPImplps.def
SimpleCOMObject_CPPImpl.vcproj.vspscc
SimpleCOMObject_CPPImplPS.vcproj.vspscc
SimpleCOMObject_CSharpImpl
KeyFile.snk
KeyFile.snk.bak_
SimpleCOMObject_CSharpImpl.csproj.user
VB
CPP
VBClient01
FormMain.frm
MSSCCPRJ.SCC
VBClient01.exe
VBClient01.vbw
VBClient01.vbp
CPPClient01
UsingStandardCOMInterop
IDotNetClassFactory
ManagedCOMLocalServer
implementations
clients
SimpleCOMObject_CSharpExeImpl
App.ico
keyfile.snk
SimpleCOMObject_CSharpExeImpl.csproj.user
CPP
CPPClient01
testobjects
interfaces
implementations
clients
interface
implementations
ITestCSharpObjectInterfaces
TestCSharpObjectInterfaces.csproj.user
TestCSharpObjectInterfaces.snk
ITestCSharpObjectInterfacesImpl01
App.ico
ITestCSharpObjectInterfacesImpl01.csproj.user
ITestCSharpObjectInterfacesImpl01.snk
IDotNetClassFactory
IDotNetClassFactory.csproj.user
IDotNetClassFactory.snk
IDotNetClassFactory_Impl01
IDotNetClassFactory_Impl01.csproj.user
IDotNetClassFactory_Impl01.snk
CPPClient01
Debug
ITestCSharpObjectInterfacesImpl01.exe
implementations
clients
ManagedCOMLocalServer_Impl01
App.ico
keyfile.snk
ManagedCOMLocalServer_Impl01.csproj.user
CPPClient01
CPPClient01.ncb
// SimpleCOMObject_CPPImpl.cpp : Implementation of DLL Exports.

#include "stdafx.h"
#include "resource.h"
#include "SimpleCOMObject_CPPImpl.h"

#include "SimpleCOMObject_i.c"

class CSimpleCOMObject_CPPImplModule : public CAtlDllModuleT< CSimpleCOMObject_CPPImplModule >
{
public :
	DECLARE_LIBID(LIBID_SimpleCOMObject_CPPImplLib)
	DECLARE_REGISTRY_APPID_RESOURCEID(IDR_SIMPLECOMOBJECT_CPPIMPL, "{399E009D-9682-476D-822A-77294A0C12E1}")
};

CSimpleCOMObject_CPPImplModule _AtlModule;


// DLL Entry Point
extern "C" BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
	hInstance;
    return _AtlModule.DllMain(dwReason, lpReserved); 
}


// Used to determine whether the DLL can be unloaded by OLE
STDAPI DllCanUnloadNow(void)
{
    return _AtlModule.DllCanUnloadNow();
}


// Returns a class factory to create an object of the requested type
STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID* ppv)
{
    return _AtlModule.DllGetClassObject(rclsid, riid, ppv);
}


// DllRegisterServer - Adds entries to the system registry
STDAPI DllRegisterServer(void)
{
    // registers object, typelib and all interfaces in typelib
    HRESULT hr = _AtlModule.DllRegisterServer();
	return hr;
}


// DllUnregisterServer - Removes entries from the system registry
STDAPI DllUnregisterServer(void)
{
	HRESULT hr = _AtlModule.DllUnregisterServer();
	return hr;
}

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License

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

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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