MCIWNDM_GET_SOURCE

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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

Address of a RECT structure to contain the coordinates of the source rectangle.

Return Values
Returns zero if successful or an error otherwise.