Platform SDK: Interprocess Communications |
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.
A window receives this message through its WindowProc function.
LRESULT CALLBACK WindowProc( HWND hwnd, // handle to window UINT uMsg, // WM_VSCROLLCLIPBOARD WPARAM wParam, // handle to window (HWND) LPARAM lParam // scroll bar code and scroll box position );
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 high-order word. |
SB_TOP | Scroll to upper left. |
The high-order word of lParam specifies the current position of the scroll box if the low-order word of lParam is SB_THUMBPOSITION; otherwise, the high-order word of lParam is not used.
If an application processes this message, it should return zero.
The clipboard owner can use the ScrollWindow function to scroll the image in the clipboard viewer window and invalidate the appropriate region.
Windows NT/2000: Requires Windows NT 3.1 or later.
Windows 95/98: Requires Windows 95 or later.
Header: Declared in Winuser.h; include Windows.h.
Clipboard Overview, Clipboard Messages, HIWORD, LOWORD, ScrollWindow