MCIWNDM_SETSPEED

The MCIWNDM_SETSPEED message sets the playback speed of an MCI device. You can send this message explicitly or by using the MCIWndSetSpeed macro.

MCIWNDM_SETSPEED

wParam = 0;

lParam = (LPARAM) (UINT) iSpeed;

Parameters
iSpeed

Playback speed. Specify 1000 for normal speed, larger values for faster speeds, and smaller values for slower speeds.

Return Values
Returns zero if successful or an error otherwise.