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RadPopupControlBasePopupOpening Event
Fires when the popup-form is about to be opened.

Namespace: Telerik.WinControls.UI
Assembly: Telerik.WinControls.UI (in Telerik.WinControls.UI.dll) Version: 2017.2.613.40 (2017.2.613.40)
Syntax
public event RadPopupOpeningEventHandler PopupOpening

Value

Type: Telerik.WinControls.UIRadPopupOpeningEventHandler
See Also