The MCIWNDM_OPENINTERFACE message attaches the data stream or file associated with the specified interface to an MCIWnd window. You can send this message explicitly or by using the MCIWndOpenInterface macro.
MCIWNDM_OPENINTERFACE
wParam = 0;
lParam = (LPARAM) (LPUNKNOWN) pUnk;
Returns zero if successful or an error otherwise.
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 Messages, MCIWndOpenInterface