Hi, when unregistering an event handler I get an exection: Python 2.3.2 (#49, Oct 2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information.

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import CLR import CLR.System.Windows.Forms as wf f=wf.Form() f <CLR.System.Windows.Forms.Form object at 0x008FE6D0> def h(s,a): print s,a ... f.Click += h f.Click -= h

Unbehandelte Ausnahme: System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt. at Python.Runtime.EventObject.RemoveEventHandler(IntPtr target, IntPtr handler) at Python.Runtime.EventBinding.nb_inplace_subtract(IntPtr ob, IntPtr arg) The same happens when I try to call the event. The demo apps run without any problem; i.e. Python event handlers are called correctly by the CLR. But trying to unregister the event handler in helloform.py: ... WinForms.MessageBox.Show("Please do not press this button again.") self.button.Click -= self.button_Click causes the same exception as shown above. Michael P.S.: I run CLR v1.1 on Win XP