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Provide a wrapper for the COM event handling model so that events will be handled in the usual .NET way, ie:
Public Sub cmdCommand_onExecute(Sender as Object, E as EventArgs)
Public Sub cmdCommand_OnExecute(ByVal key As RibbonLib.Interop.PropertyKeyRef, ByVal currentValue As RibbonLib.Interop.PropVariantRef, ByVal commandExecutionProperties As RibbonLib.Interop.IUISimplePropertySet) Handles cmdCommand.OnExecute