You see the attached image file, this very same combobox control when you hover on the number 1 click on the arrow down 1 the same menubar menu, hover in the 2 and 3 show up as the number 1 button, if in the area No. 2 is clicked, the button will be displayed on the No. 1 as we manipulate click items in the combobox, if in the number 3 is clicked will open 1 form, particularly in the region of 2 to add or delete items will be added or removed as combobox manipulation, you know DevExpress controls are in the name of anything?