Get DLL path at runtime

Question

I want to get a dll\'s directory (or file) path from within its code. (not the program\'s .exe file path)

I\'ve tried a few methods I\'ve found:

Answer 1

Provided you implemented the following dll entry point: (usually dllmain.cpp)

BOOL APIENTRY DllMain( HMODULE hModule,
                   DWORD  ul_reason_for_call,
                   LPVOID lpReserved
                 )

You can simply do:

switch (ul_reason_for_call)
{ 
case DLL_PROCESS_ATTACH:
{
    TCHAR dllFilePath[512 + 1] = { 0 };
    GetModuleFileNameA(hModule, dllFilePath, 512)
}
    break;
case DLL_THREAD_ATTACH: break;
...

dllFilePath will then contain the path to where the current dll code was loaded. In this case hModule is passed by the process loading the dll.