This message is sent by an application to set the width, in pixels, by which a list box can be scrolled horizontally (the scrollable width). If the width of the list box is smaller than this value, the horizontal scroll bar horizontally scrolls items in the list box. If the width of the list box is equal to or greater than this value, the horizontal scroll bar is hidden.
At a Glance
| Header file: | Winuser.h |
| Windows CE versions: | 1.0 and later |
Syntax
LB_SETHORIZONTALEXTENT wParam = (WPARAM) cxExtent;
lParam = 0;
Parameters
cxExtent
Specifies the number of pixels by which the list box can be scrolled.
Windows 95 and Windows 98: The wParam parameter is limited to 16-bit values.
Return Values
None
Remarks
To respond to the LB_SETHORIZONTALEXTENT message, the list box must have been defined with the WS_HSCROLL style.
See Also