An application sends the CB_GETHORIZONTALEXTENT message to retrieve from a combo box the width, in pixels, by which the list box can be scrolled horizontally (the scrollable width). This is applicable only if the list box has a horizontal scroll bar.
CB_GETHORIZONTALEXTENT wParam = 0; // not used, must be zero lParam = 0; // not used, must be zero
This message has no parameters.
The return value is the scrollable width, in pixels.
file: /Techref/os/win/api/win32/mess/src/msg01_21.htm, 1KB, , updated: 2000/4/7 12:19, local time: 2024/9/4 06:26,
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