WM_CAP_SET_SCROLL

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 Values

Returns TRUE if successful or FALSE otherwise.

Remarks

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

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in vfw.h.

See Also

Video Capture Overview, Video Capture Messages, capSetScrollPos