How to determine a C# class in C++ code

[Juri]

Hi,
I have a .NET control hosted in a CWinFormsView. In the CWinFormsView I have enabled events in the .NET control to callback to a method in the CWinFormsView by using the BEGIN_DELEGATE_ MAP macro. Everything works just fine, the native method is called properly:

void CGraphControlView::ObjectDoubleClicked(System::Object^ sender, Northwoods::Go::GoObjectEventArgs^ e)
{
	TRACE(_T(" Graph object double clicked\n"));
}

Now, since I am not so familiar in writing mixed mode applications, my question is:
- How to determine if the class of the Object returned by the EventArgs handler is of a specific class inherited from System::Object, e.g.

	public class GraphNode : Object

void CGraphControlView::ObjectDoubleClicked(System::Object^ sender, Northwoods::Go::GoObjectEventArgs^ e)
{
	TRACE(_T(" Graph object double clicked\n"));
	// I would like to add something like
	if (e->Object is a type of GraphNode)
		DoSomething ....
	else if (e->Object is a type of SomeOtherObject)
		DoSomethingElse ....
}

Help would be appreciated?
/Juri