WM_HSCROLLCLIPBOARD  G3PCMC 

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

WM_HSCROLLCLIPBOARD

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.

See Also

ScrollWindow