The MCIWndSendString macro sends an MCI command in string form to the device associated with the MCIWnd window. You can use this macro or explicitly send the MCIWNDM_SENDSTRING message.
LONG MCIWndSendString(
hwnd,
sz
);
Returns zero if successful or an error otherwise.
The message handler for MCIWndSendString (and MCIWNDM_SENDSTRING) appends a device alias to the MCI command you send to the device. Therefore, you should not use any alias in an MCI command that you issue with MCIWndSendString.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in vfw.h.
MCIWnd Window Class Overview, MCIWnd Macros, MCIWNDM_SENDSTRING