DropDown event

I can't find the event I need. I need a event to let me know when the drop down has changed.

GoText gotext = new GoText ();<?:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

gotext.Editable = true;

gotext.EditorStyle = GoTextEditorStyle.ComboBox;

gotext.DropDownList = true;

gotext.Choices = list; // list is a ArrayList

Are you asking about when the GoText.Choices property is set?

If so, define a GoDocument.Changed or a GoView.DocumentChanged event handler that checks for the GoChangedEventArgs.SubHint equal to GoText.ChangedChoices.
Remember that that property value can be shared by multiple GoText objects, and that modifications to that ArrayList do not cause any Changed notifications.