LB_SETHORIZONTALEXTENT
An
application sends an LB_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.
LB_SETHORIZONTALEXTENT
wParam = (WPARAM) cxExtent; // horizontal scroll
width
lParam = 0; // not used; must be zero
Parameters
cxExtent
Value of wParam.
Specifies the number of pixels by which the list box can be scrolled.
Windows
95: The wParam parameter is
limited to 16-bit values.
Return Values
This message
does not return a value.
Remarks
To respond to
the LB_SETHORIZONTALEXTENT message, the list box must have been defined with
the WS_HSCROLL style.
See Also