The following example shows how to create a checked combo box.
To enable this appearance, we set the editor's StyleSettings property to CheckedComboBoxStyleSettings:
[XAML]<dxe:ComboBoxEdit.StyleSettings><dxe:ComboBoxStyleSettings/></dxe:ComboBoxEdit.StyleSettings>
Notethat a similar approach can be used to implement a radio button list. Use RadioComboBoxStyleSettings as demonstrated in the E1982: How to Apply Style Settings to the ComboBoxEdit example.