對於普通規則的Dll，有需要的情況下通常會在DllMain中儲存第一個引數hInstance的值，而MFC規則dll沒有DllMain（準確來說是由MFC框架封裝了），那該怎麼拿到呢？

有人說GetModuleHandle(lpDllName)醬紫方法可以拿到。但是考慮一個問題，如果dll名字唄改了（極少數情況。。。），應該有種更好的方法。我們看MFC中給出的DllMain：

C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\atlmfc\src\mfc\dllinit.cpp :

BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID)
{
	try
	{
		if (dwReason == DLL_PROCESS_ATTACH)
		{

#ifdef _AFX_OLE_IMPL
			BOOL bRegister = !coreDLL.bInitialized;

			// shared initialization
			AFX_MODULE_STATE* pModuleState = _AfxGetOleModuleState();
			pModuleState->m_hCurrentInstanceHandle = hInstance;
			pModuleState->m_hCurrentResourceHandle = hInstance;
			pModuleState->m_pClassInit = pModuleState->m_classList.GetHead();
			pModuleState->m_pFactoryInit = pModuleState->m_factoryList.GetHead();
#endif
 

m_hCurrentInstanceHandle 

m_hCurrentResourceHandle 

AfxGetModuleState();

所以我們可以醬紫拿到hInstance：

BOOL CMFC_Handle_TestApp::InitInstance()
{
	CWinApp::InitInstance();
    AFX_MODULE_STATE* state = AfxGetModuleState();
    cout << state->m_hCurrentInstanceHandle << endl;
	return TRUE;
}