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DesignerActionUIService.DesignerActionUIStateChange Event

Occurs when a request is made to show or hide a smart tag panel.

Namespace:  System.ComponentModel.Design
Assembly:  System.Design (in System.Design.dll)

public event DesignerActionUIStateChangeEventHandler DesignerActionUIStateChange

The following table lists the set of specialized classes associated with the DesignerActionUIStateChange event.

Specialized type



Adds information specific to smart tag panel management. This class is specialized from EventArgs.


Connects the DesignerActionUIStateChangeEventArgs with its handler.


Denotes whether the smart tag panel is being displayed or hidden.

For more information about handling events, see Consuming Events.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0
© 2015 Microsoft