mciGenericParms.dwCallback = (DWORD)mainwindow;
if ((dwReturn = mciSendCommand(wDeviceID, MCI_PAUSE, 0, (DWORD)(LPVOID) &mciGenericParms)))
{
mciGenericParms.dwCallback = (DWORD)mainwindow;
if ((dwReturn = mciSendCommand(wDeviceID, MCI_PAUSE, 0, (DWORD)(LPVOID) &mciGenericParms)))
{