CMFCRibbonComboBox::IsResizeDropDownList
Indicates whether or not the list box can be resized.
BOOL IsResizeDropDownList() const;
Return Value
TRUE if the list box can be resized; otherwise FALSE.
Remarks
You can enable list box resizing by using the CMFCRibbonComboBox::EnableDropDownListResize method.
Requirements
Header: afxribboncombobox.h