MCI_STOP

This MCI command message stops all play and record sequences, unloads all play buffers, and ceases display of video images. Support of this message by a device is optional.

Parameters DWORD lParam1

The following flags apply to all devices supporting MCI_STOP:

MCI_NOTIFY

Specifies that MCI should post the MM_MCINOTIFY message when this command completes. The window that receives this message is specified in the dwCallback field of the data structure identified by lParam2.

MCI_TEST

Queries the device to determine if it can execute the command. The device returns an error if it is incapable of executing the command. It returns no error if it can handle the command. MCI returns control to the application without executing the command.

MCI_WAIT

Specifies that the device should stop before MCI returns control to the application.