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CommandBarDropDownListPopupOpening Event
Occurs when the popup is about to be opened.

Namespace: Telerik.WinControls.UI
Assembly: Telerik.WinControls.UI (in Telerik.WinControls.UI.dll) Version: 2018.2.619.40 (2018.2.619.40)
Syntax
public event CancelEventHandler PopupOpening

Value

Type: System.ComponentModelCancelEventHandler
See Also