WM_VSCROLLCLIPBOARD - Syntax

This message is sent to the clipboard owner window when the clipboard contains a data handle for the CFI_OWNERDISPLAY format, and there is an event in the clipboard viewer's vertical scroll bar.

param1
     HWND   hwndViewer   /*  Handle. */

param2
     SHORT  sposScroll   /*  Scroll position. */
     SHORT  scodeScroll  /*  Scroll-bar code. */