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WM_CAP_SET_SCROLL message

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The WM_CAP_SET_SCROLL message defines the portion of the video frame to display in the capture window. This message sets the upper left corner of the client area of the capture window to the coordinates of a specified pixel within the video frame. You can send this message explicitly or by using the capSetScrollPos macro.

WM_CAP_SET_SCROLL 
wParam = (WPARAM) 0; 
lParam = (LPARAM) (LPPOINT) (lpP);

Parameters

lpP

Address to contain the desired scroll position.

Return Value

Returns TRUE if successful or FALSE otherwise.

Remarks

The scroll position affects the image in both preview and overlay modes.

Requirements

Requirement Value
Minimum supported client
 Windows 2000 Professional [desktop apps only]
Minimum supported server
 Windows 2000 Server [desktop apps only]
Header
Vfw.h

See also

Video Capture

Video Capture Messages