NGWS SDK Documentation  

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RichControl.Invoke (Delegate)

Executes the given delegate on the thread that owns this Control's underlying window handle. It is an error to call this on the same thread that the control belongs to. If the control's handle doesn't exist yet, this will follow up the control's parent chain until it finds a control or form that does have a window handle. If no appropriate handle can be found, invoke will throw an exception. Exceptions that are raised during the call will be propapgated back to the caller. There are five functions on a control that are safe to call from any thread: GetInvokeRequired, Invoke, BeginInvoke, EndInvoke and CreateGraphics. For all other metohd calls, you should use one of the invoke methods to marshal the call to the control's thread.

[Visual Basic]
Overloads Public Function Invoke( _
   ByVal method As Delegate _
) As Object
[C#]
public object Invoke(
   Delegate method
);
[C++]
public: Object* Invoke(
   Delegate* method
);
[JScript]
public function Invoke(
   method : Delegate
) : Object;

Parameters

method
A delegate that contains a method to be called in in the control's thread context. The delegate can be an instance of EventHandler, in which case the sender parameter will contain this control, and the event parameter will contain EventArgs.Empty. The delegate can also be an instance of MethodInvoker, or any other delegate that takes a void parameter list. A call to an EventHandler or MethodInvoker delegate will be faster than a call to another type of delegate.

Return Value

the return value from the delegate being invoked, or null if the delegate has no return value.

See Also

RichControl Class | RichControl Members | System.WinForms Namespace | RichControl.Invoke Overload List | MethodInvoker