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RadMultiColumnComboBoxDropDownOpened Event
Occurs before the drop-down window appears.

Namespace: Telerik.WinControls.UI
Assembly: Telerik.WinControls.GridView (in Telerik.WinControls.GridView.dll) Version: 2017.2.613.40 (2017.2.613.40)
Syntax
[BrowsableAttribute(true)]
public event EventHandler DropDownOpened

Value

Type: SystemEventHandler
See Also