void ShowScrollBar( UINT nBar, BOOL bShow = TRUE );
nBar
Specifies whether the scroll bar is a control or part of a window's nonclient area. If it is part of the nonclient area, nBar also indicates whether the scroll bar is positioned horizontally, vertically, or both. It must be one of the following values:
| Value | Meaning |
| SB_BOTH | Specifies the CWnd's horizontal and vertical scroll bars. |
| SB_CTL | Specifies that the CWnd is a scroll-bar control. |
| SB_HORZ | Specifies the CWnd's horizontal scroll bar. |
| SB_VERT | Specifies the CWnd's vertical scroll bar. |
bShow
Specifies whether or not Windows hides the scroll bar. If bShow is FALSE, the scroll bar is hidden. Otherwise, the scroll bar is displayed.
Displays or hides a scroll bar, depending on the value of bShow. If bShow is TRUE, the scroll bar is displayed; if FALSE, the scroll bar is hidden.
::ShowScrollBar