How do I get a reference to FCKDialog

I want to call the OpenDialog method of the FCKDialog object I am able to obtain a reference to the editor instance but I can't use it to call the OpenDialog method, from reading the source for the FCKEditor I can see that FCKDialog is used to call the OpenDialog method, but I can't see how to get a reference to it so that I can call its methods, is it possible to use the editor instance which is obtained using FCKeditorAPI.GetInstance to somehow call OpenDialog or get a reference to FCKDialog