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AsmSource : Assembly Language Programming

Dos Source

Win Source





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The ShowScrollBar function shows or hides the specified scroll bar.

BOOL ShowScrollBar(
  HWND hWnd,  // handle to window
  int wBar,   // scroll bar
  BOOL bShow  // scroll bar visibility


[in] Handle to a scroll bar control or a window with a standard scroll bar, depending on the value of the wBar parameter.
[in] 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 to 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.

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

Return Values

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.


  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Requires Windows 95 or later.
  Header: Declared in Winuser.h; include Windows.h.
  Library: Use User32.lib.

See Also

Scroll Bars Overview, Scroll Bar Functions, EnableScrollBar