Adds an event handler for the dropDown event notification. This event is sent whenever the dropdown portion of the combo is dropped down. Duplicates are not filtered out.
[Visual Basic] Public Sub AddOnDropDown( _ ByVal handler As EventHandler _ ) [C#] public void AddOnDropDown( EventHandler handler ); [C++] public: void AddOnDropDown( EventHandler* handler ); [JScript] public function AddOnDropDown( handler : EventHandler );
ComboBox Class | ComboBox Members | System.WinForms Namespace