The following code illustrates how to close a device context.
ULONG mciDriverEntry (PINSTANCE pInst,
USHORT usMessage,
ULONG ulParam1,
ULONG ulParam2,
USHORT usUserParam)
{
switch (usMessage) {
case MCI_DEVICESETTINGS:
return(InsertPage ((PMCI_DEVICE_SETTINGS_PARMS) ulParam2));
}
}