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The CSplitButton class represents a split button control. The split button control performs a default behavior when a user clicks the main part of the button, and displays a drop-down menu when a user clicks the drop-down arrow of the button.
The CSplitButton class is derived from the CButton class. The split button control is a button control whose style is BS_SPLITBUTTON. It displays a custom menu when a user clicks the drop-down arrow. For more information, see the BS_SPLITBUTTON and BS_DEFSPLITBUTTON styles in Button Styles.
The following figure depicts a dialog box that contains a pager control and a (1) split button control. The (2) drop-down arrow has already been clicked and the (3) submenu is displayed.
This class is supported in Windows Vista and later.
Additional requirements for this class are described in Build Requirements for Windows Vista Common Controls.