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The MCIWNDM_GET_SOURCE message retrieves the coordinates of the source rectangle used for cropping the images of an AVI file during playback. You can send this message explicitly or by using the MCIWndGetSource macro.
MCIWNDM_GET_SOURCE
wParam = 0;
lParam = (LPARAM) (LPRECT) prc;
Parameters
prc
Pointer to a RECT structure to contain the coordinates of the source rectangle.
Return Values
Returns zero if successful or an error otherwise.
Requirements
** Windows NT/2000/XP:** Included in Windows NT 3.1 and later.
** Windows 95/98/Me:** Included in Windows 95 and later.
** Header:** Declared in Vfw.h.
See Also