Invoke User Control response type
An event handler with the Invoke User Control response type calls into a .NET WinForms user control and/or web control that is hosted as a user control component on a form. This response type calls the Invoke method of the control, which is part of the IWinStudioUserControl interface and must be implemented in the user control code.
Note: This event handler response type does not work in the web client
and is now deprecated.