How to Determine if Multimedia Windows Is Running (77698)

SUMMARY

When Microsoft Multimedia Windows is run, certain drivers, such as MMSOUND.DRV and MMSYSTEM.DLL, are loaded immediately. An application can use this information to determine whether Multimedia Windows is running, as follows:

   hModule = GetModuleHandle("mmsystem.dll");
   if (!hModule)
      {
      bMultimedia = FALSE;
      MessageBox(NULL,
           "This application should be run with MMWindows",
           "Alert", MB_OK);
      }
				

GetModuleHandle() attempts to retrieve the "module instance" handle to the MMSYSTEM dynamic-link library (DLL). The return value is zero if MMSYSTEM has not been loaded and greater than zero if MMSYSTEM is loaded. Therefore, when hModule is zero, Multimedia Windows is not running; otherwise, Multimedia Windows is running.