CB_SETHORIZONTALEXTENT  HIEEF 

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.

See Also