The CloseUp event occurs when the dropdown calendar is dismissed and disappears.
[Visual Basic] Overridable Protected Sub OnCloseUp( _ ByVal eventargs As EventArgs _ ) [C#] protected virtual void OnCloseUp( EventArgs eventargs ); [C++] protected: virtual void OnCloseUp( EventArgs* eventargs ); [JScript] protected function OnCloseUp( eventargs : EventArgs );
DateTimePicker Class | DateTimePicker Members | System.WinForms Namespace