CB_SETHORIZONTALEXTENT

An application sends the CB_SETHORIZONTALEXTENT message 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 or, if the combo box has the CBS_DISABLENOSCROLL style, disabled.

CB_SETHORIZONTALEXTENT 
wParam = (WPARAM) cxExtent;            // scrollable width of list box, in pixels 
lParam = 0;                            // not used, must be zero 
 

Parameters

cxExtent
Specifies the scrollable width of the list box, in pixels.

Return Values

No return value.

QuickInfo

  Windows NT: Requires version 4.0 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Requires version 1.0 or later.
  Header: Declared in winuser.h.

See Also

Combo Boxes Overview, Combo Box Messages, CB_GETHORIZONTALEXTENT