EnableScrollBar
The EnableScrollBar
function enables or disables one or both scroll bar arrows.
BOOL EnableScrollBar(
|
HWND hWnd, |
// handle to window
or scroll bar |
|
UINT wSBflags, |
// scroll bar type
flag |
|
UINT wArrows |
// scroll bar arrow
flag |
|
); |
|
Parameters
hWnd
Identifies a
window or a scroll bar control, depending on the value of the wSBflags
parameter.
wSBflags
Specifies the
scroll bar type. This parameter can be one of the following values:
|
Value |
Meaning |
|
SB_BOTH |
Enables or
disables the arrows on the horizontal and vertical scroll bars associated
with the specified window. The hWnd parameter must be the handle to
the window. |
|
SB_CTL |
Identifies
the scroll bar as a scroll bar control. The hWnd parameter must be the
handle to the scroll bar control. |
|
SB_HORZ |
Enables or
disables the arrows on the horizontal scroll bar associated with the
specified window. The hWnd parameter must be the handle to the window. |
|
SB_VERT |
Enables or
disables the arrows on the vertical scroll bar associated with the specified
window. The hWnd parameter must be the handle to the window. |
wArrows
Specifies
whether the scroll bar arrows are enabled or disabled and indicates which
arrows are enabled or disabled. This parameter can be one of the following
values:
|
Value |
Meaning |
|
ESB_DISABLE_BOTH |
Disables
both arrows on a scroll bar. |
|
ESB_DISABLE_DOWN |
Disables
the down arrow on a vertical scroll bar. |
|
ESB_DISABLE_LEFT |
Disables
the left arrow on a horizontal scroll bar. |
|
ESB_DISABLE_LTUP |
Disables
the left arrow on a horizontal scroll bar or the up arrow of a vertical
scroll bar. |
|
ESB_DISABLE_RIGHT |
Disables
the right arrow on a horizontal scroll bar. |
|
ESB_DISABLE_RTDN |
Disables
the right arrow on a horizontal scroll bar or the down arrow of a vertical
scroll bar. |
|
ESB_DISABLE_UP |
Disables
the up arrow on a vertical scroll bar. |
|
ESB_ENABLE_BOTH |
Enables
both arrows on a scroll bar. |
Return Values
If the arrows
are enabled or disabled as specified, the return value is nonzero.
If the arrows
are already in the requested state or an error occurs, the return value is zero.
See Also