WM_CAP_GET_VIDEOFORMAT

	Overview

	Group

	Quick Info

The WM_CAP_GET_VIDEOFORMAT message retrieves a copy of the video format in use or the size required for the video format. You can send this message explicitly or by using the capGetVideoFormat and capGetVideoFormatSize macros.

wParam = (WPARAM) (wSize);

lParam = (LPARAM) (LPVOID) (psVideoFormat);

Parameters
wSize

Size, in bytes, of the structure referenced by s.

psVideoFormat

Address of a BITMAPINFO structure. You can also specify NULL to retrieve the number of bytes needed by BITMAPINFO.

Return Values
Returns the size, in bytes, of the video format or zero if the capture window is not connected to a capture driver. For video formats that require a palette, the current palette is also returned.

Remarks
Because compressed video formats vary in size requirements applications must first retrieve the size, then allocate memory, and finally request the video format data.

See Also
BITMAPINFO, capGetVideoFormat, capGetVideoFormatSize

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