DLL 的DllMain函数

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