MCIWNDM_NOTIFYMEDIA  1_IW26L 

The MCIWNDM_NOTIFYMEDIA message notifies the parent window of an application that the media has changed.

MCIWNDM_NOTIFYMEDIA

wParam = (WPARAM) (HWND) hwnd;

lParam = (LPARAM) (LPSTR) lp;

Parameters

hwnd

Handle of the MCIWnd window.

lp

Address of a null-terminated string containing the new filename. If the media is closing, it specifies a null string.

Remarks

You can enable notification of media changes by specifying the MCIWNDF_NOTIFYMEDIA window style.