WM_VSCROLLCLIPBOARD

Overview

Group

Quick Info

Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
-
Header File
winuser.h
Unicode
No
Platform Notes
None

The WM_VSCROLLCLIPBOARD message is sent to the clipboard owner by a clipboard viewer window when the clipboard contains data in the CF_OWNERDISPLAY format and an event occurs in the clipboard viewer's vertical scroll bar. The owner should scroll the clipboard image and update the scroll bar values.

WM_VSCROLLCLIPBOARD

hwndViewer = (HWND) wParam; // handle of clipboard viewer window

nScrollCode = (int) LOWORD(lParam); // scroll bar code

nPos = (int) HIWORD(lParam); // scroll box position

Parameters
hwndViewer

Value of wParam. Identifies the clipboard viewer window.

nScrollCode

Value of the low-order word of lParam. Specifies a scroll bar event. This parameter can be one of the following values:

Value	Meaning
SB_BOTTOM	Scroll to lower right.
SB_ENDSCROLL	End scroll.
SB_LINEDOWN	Scroll one line down.
SB_LINEUP	Scroll one line up.
SB_PAGEDOWN	Scroll one page down.
SB_PAGEUP	Scroll one page up.
SB_THUMBPOSITION	Scroll to absolute position. The current position is specified by the nPos parameter.
SB_TOP	Scroll to upper left.

nPos

Value of the high-order word of lParam. Specifies the current position of the scroll box if the nScrollCode parameter is SB_THUMBPOSITION; otherwise, the nPos parameter is not used.

Return Values
If an application processes this message, it should return zero.

Remarks
The clipboard owner can use the ScrollWindow function to scroll the image in the clipboard viewer window and invalidate the appropriate region.