This member function retrieves the width, in pixels, by which the list-box portion of the combo box can be scrolled horizontally. This is applicable only if the list-box portion of the combo box has a horizontal scroll bar.
UINT GetHorizontalExtent( ) const;
| Header File | Afxwin.h | 
| Platforms | |
| Versions | 1.0 and later | 
| Complete documentation | Visual C++ documentation | 
CComboBox Overview, CComboBox Member Functions, Control Classes, CListBox::SetHorizontalExtent