This service can be obtained from the local IServiceProvider. Typically, this will be the instance supplied to the EditValue() method.

DropDownControl() will show a System.Windows.Forms.Control as a drop-down, and CloseDropDown() will clear any control currently showing. Alternatively, you can show a System.Windows.Forms.Form using ShowDialog().

public interface IWindowsFormsEditorService {
// Public Instance Methods
   public void CloseDropDown();
   public void DropDownControl(System.Windows.Forms.Control control);
   public DialogResult ShowDialog(
        System.Windows.Forms.Form dialog);
}