Private Sub FpSpread1_PrintDocument(sender As Object, e As FarPoint.Win.Spread.PrintDocumentEventArgs) Handles FpSpread1.PrintDocument
        If e.EventType = PrintDocumentEventType.EndPrintDocument Then
            If InvokeRequired Then
                Invoke(Function()
                           Me.Close()
                       End Function)
            Else
                Me.Close()
            End If
        End If
    End Sub