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 public void OnPrinterPropertyChange(SPrinterProperty sp)
 {
     if (SPrinterProperty.IsEpson(sp.ePrinterHead))
     {
         this.m_CheckBoxBeepBeforePrint.Visible = false;
     }
     if (sp.EPSONLCD_DEFINED)
     {
         m_labelLang.Visible = m_ComboBoxLang.Visible = false;
         m_CheckBoxDelJobAfterPrint.Location = m_labelUnit.Location;
         m_labelUnit.Location    = m_labelLang.Location;
         m_ComboBoxUnit.Location = m_ComboBoxLang.Location;
     }
     this.checkBoxShowAttention.Visible        = sp.IsDisplayForm();
     this.checkBoxShowMeasurBeforPrint.Visible = sp.IsZMeasurSupport;
     this.isDirty = false;
 }