WM_CAP_SET_SCROLL message
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 |
|