Capture Window Status
You can retrieve the current status of a capture window by using the
WM_CAP_GET_STATUS message (or the
capGetStatus macro). This message retrieves a copy of the
CAPSTATUS structure with the current values of its members. The
CAPSTATUS structure contains information regarding the dimensions of the image, scroll
position, and whether overlay or preview of the image is enabled. Because the
information represented in
CAPSTATUS is dynamic, your application should refresh the contents of the structure
whenever the size or format of the captured video stream might have changed (such
as after displaying the video format of the capture driver).
Changing the dimensions of the capture window has no effect on the dimensions
of the actual captured video stream. The format dialog box displayed by the
video capture device driver controls the dimensions of the captured video stream.
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