MCIWNDM_SETVOLUME

The MCIWNDM_SETVOLUME message sets the volume level of an MCI device. You can send this message explicitly or by using the MCIWndSetVolume macro.

MCIWNDM_SETVOLUME

wParam = 0;

lParam = (LPARAM) (UINT) iVol;

Parameters
iVol

New volume level. Specify 1000 for normal volume level. Specify a higher value for a louder volume or a lower value for a quieter volume.

Return Values
Returns zero if successful or an error otherwise.