MCI_STEP

This MCI command message steps the player one or more frames.

Parameters DWORD lParam1

The following flags apply to all devices supporting MCI_STEP:

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 step operation should finish before MCI returns control to the application.