Question

The below code executes, but it only extracts an empty bitmap file. Any ideas as to what is wrong with it?

void Extract(WORD wResId , LPSTR lpszOutputPath)
{ //example: Extract(IDB_BITMAP1, "Redrose.bmp");
    HRSRC hrsrc = FindResource(NULL, MAKEINTRESOURCE(wResId) , RT_BITMAP);
    HGLOBAL hLoaded = LoadResource( NULL,hrsrc);
    LPVOID lpLock =  LockResource( hLoaded);
    DWORD dwSize = SizeofResource(NULL, hrsrc);
    HANDLE hFile = CreateFile  (lpszOutputPath,GENERIC_WRITE,0,NULL,CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
    DWORD dwByteWritten;
    WriteFile(hFile, lpLock , dwSize , &dwByteWritten , NULL);
    CloseHandle(hFile);
    FreeResource(hLoaded);
}

Answer 1

You are asking for RT_RCDATA but I bet you didn’t add your bitmap via a RCDATA statement. You probably added it via a BITMAP statement, which makes it RT_BITMAP.

In the future, please state which step failed rather than making people guess.