Represents a combination of a standard button on the left and a drop-down button on the right, or the other way around if the value of System.Windows.Forms.RightToLeft is Yes.
See Also: ToolStripSplitButton Members
System.Windows.Forms.ToolStripSplitButton combines button and drop-down button functionality.
Use the ToolStripSplitButton.DefaultItem property to synchronize the Control.Click event of the chosen drop-down item with the item shown on the button.