◄CWnd► ◄Up► ◄Contents► ◄Index► ◄Back► ──Microsoft Foundation Classes────────────────────────────────────────────── afx_msg void OnHScroll( UINT nSBCode, UINT nPos, CScrollBar* pScrollBar ); Parameter Description <nSBCode> Specifies a scroll-bar code that indicates the user's scrolling request. This parameter can be one of the following values: Value Description 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 the absolute position. The current position is provided in <nPos>. SB_TOP Scroll to upper left. <nPos> Specifies the scroll box position if the scroll-bar code is SB_THUMBPOSITION; otherwise, not used. <pScrollBar> If the control is a scroll bar, contains a pointer to the control. If the user clicked a pop-up window's scroll bar, this parameter is not used. Remarks Called when the user clicks a window's horizontal scroll bar. The SB_THUMBTRACK notification code typically is used by applications that give some feedback while the scroll box is being dragged. If an application scrolls the contents controlled by the scroll bar, it must also reset the position of the scroll box by using the ◄SetScrollPos► member function. This message-handler member function calls the ◄Default► member function. Override this member function in your derived class to handle the ◄WM_HSCROLL► message. See Also ◄CWnd::SetScrollPos►, ◄WM_VSCROLL►, ◄WM_HSCROLL►, ◄CWnd::Default► -♦-