ShowScrollBar info Overview Group

The ShowScrollBar function shows or hides the specified scroll bar.

BOOL ShowScrollBar(

HWND hWnd,	// handle of window with scroll bar
int wBar,	// scroll bar flag
BOOL bShow	// scroll bar visibility flag
);

Parameters

hWnd

Identifies a scroll bar control or a window with a standard scroll bar, depending on the value of the wBar parameter.

wBar

Specifies the scroll bar(s) to be shown or hidden. This parameter can be one of the following values:

Value	Meaning
SB_BOTH	Shows or hides a window’s standard horizontal and vertical scroll bars.
SB_CTL	Shows or hides a scroll bar control. The hWnd parameter must be the handle of the scroll bar control.
SB_HORZ	Shows or hides a window’s standard horizontal scroll bars.
SB_VERT	Shows or hides a window’s standard vertical scroll bar.

bShow

Specifies whether the scroll bar is shown or hidden. If this parameter is TRUE, the scroll bar is shown; otherwise, it is hidden.

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

You should not call this function to hide a scroll bar while processing a scroll bar message.