Occurs each time a BaseSpinEdit control's pop-up was displayed.
[Browsable(false)] public override event EventHandler Popup
<Browsable(False)> Public Overrides Event Popup As EventHandler
The Popup event's data class is EventArgs.
After an end-user attempts to invoke a BaseSpinEdit control's pop-up, the BaseSpinEdit.QueryPopUp event occurs. You can handle it to allow or cancel the pop-up window display. If the BaseSpinEdit.QueryPopUp event was not canceled, the Popup event fires.