Hi I am working on a very small (simple) application, mainly to get to know gtk-sharp better. But I need to hide a window, while another is showing. I want to do this when a button is pushed, I thought I could do this from the function connected to the button with the EventHandler, such as " button.Clicked += new EventHandler(next);" and put something like "win.Visible = false;" in that function, but when I do this I get a terrible error:
Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at dataHolder.test (System.Object temp) [0x00000] at inputWindow.next (System.Object obj, System.EventArgs args) [0x00000] at (wrapper delegate-invoke) System.MulticastDelegate:invoke_void_object_EventArgs (object, System.EventArgs) at GLib.Signal.voidObjectCallback (IntPtr handle, IntPtr gch) [0x00000] at (wrapper native-to-managed) GLib.Signal:voidObjectCallback(intptr,intptr) at <0x00000> <unknown method> at (wrapper managed-to-native) Gtk.Application:gtk_main () at Gtk.Application.Run () [0x00000] at inputWindow.makeWindow () [0x00000] at inputWindow..ctor (System.Object temp) [0x00000] at Sample.Main () [0x00000] How can I avoid this? Hope my description was understandable, but pleas ask if there is something you don't understand. Thanks in advance Søren Juul
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