รบกวนสอบถามเกี่ยวกับ Web Service can't print dot matrix

    <WebMethod()> _
    Public Function Print_Sticker(ByVal Pallet_No As String, ByVal Location As String, ByVal Article As String, _
                                    ByVal Description As String, ByVal Qty As String) As Boolean
        PAL = Pallet_No
        PQTY = Qty
        LOC = Location
        ART = Article
        DESC = Description
        Try
            For rcoun As Integer = 0 To PQTY - 1
                pd.PrinterSettings.PrinterName = "IntermecPC43t"
                Artloop = rcoun + 1
                pd.Print()
            Next
            Return True
        Catch ex As Exception
            Throw ex
        End Try

    End Function
    Public Sub _Print(ByVal s As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles pd.PrintPage
        e.Graphics.DrawString("*" & PAL & "*", Fbarfont, Brushes.Black, x + 15, y + 55)
        e.Graphics.DrawString(PAL, Dfont, Brushes.Black, x + 15, y + 80)
        e.Graphics.DrawString(LOC, Bfont, Brushes.Black, x + 100, y + 5)
        e.Graphics.DrawString(ART & "-" & DESC, Dfont, Brushes.Black, x + 15, y + 30)
        e.Graphics.DrawString(" " & Artloop & " / " & PQTY, Bfont, Brushes.Black, x + 230, y + 5)
    End Sub

 Private Sub TxtQTY_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TxtQTY.KeyPress
        If e.KeyChar = Chr(13) Then
        ReturnToPickingService.Print_Sticker(TxtPalletNo.Text, TxtPicking.Text, TxtArticle.Text, TxtDesc.Text, TxtQTY.Text)
        End If
End Sub