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WindowsApi:DllMain

MSVC의 Dynamic library 프로젝트에 사용되는 DllMain에 대하여 정리한다.

Startup project

헤더파일은 아래와 같다: 

#include <SDKDDKVer.h>
#define WIN32_LEAN_AND_MEAN    // Exclude rarely-used stuff from Windows headers
#include <windows.h>

#ifdef SIMPLEWIN32DLL_EXPORTS
#define SIMPLEWIN32DLL_API __declspec(dllexport)
#else
#define SIMPLEWIN32DLL_API __declspec(dllimport)
#endif

// This class is exported from the SimpleWin32Dll.dll
class SIMPLEWIN32DLL_API CSimpleWin32Dll {
public:
    CSimpleWin32Dll(void);
    // TODO: add your methods here.
};

extern SIMPLEWIN32DLL_API int nSimpleWin32Dll;

SIMPLEWIN32DLL_API int fnSimpleWin32Dll(void);

소스파일은 아래와 같다: 

// This is an example of an exported variable
SIMPLEWIN32DLL_API int nSimpleWin32Dll=0;

// This is an example of an exported function.
SIMPLEWIN32DLL_API int fnSimpleWin32Dll(void)
{
    return 42;
}

// This is the constructor of a class that has been exported.
// see SimpleWin32Dll.h for the class definition
CSimpleWin32Dll::CSimpleWin32Dll()
{
    return;
}

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
    {
    case DLL_PROCESS_ATTACH:
    case DLL_THREAD_ATTACH:
    case DLL_THREAD_DETACH:
    case DLL_PROCESS_DETACH:
        break;
    }
    return TRUE;
}

See also