Draws the drop-down arrow of the button onto a specified Graphics object.
This method draws the drop-down arrow in the center of the drop-down button. You can obtain the bounds of the drop-down button using GetDropDownRectangle.
The drop-down arrow is only drawn when the ButtonType property is RebarButtonType.MenuOrPush or RebarButtonType.Menu, and BandType property is RebarBandType.ToolBar.
RebarButtonRenderer Class | Skybound.Rebar.Rendering Namespace