'宣言 Protected Friend Overridable Sub OnDocumentChanged( _ ByVal oldDocument As Infragistics.Documents.RichText.RichTextDocument, _ ByVal newDocument As Infragistics.Documents.RichText.RichTextDocument _ )
protected internal virtual void OnDocumentChanged( Infragistics.Documents.RichText.RichTextDocument oldDocument, Infragistics.Documents.RichText.RichTextDocument newDocument )