private void labelExportStat_Click(object sender, EventArgs e)
 {
     if (formExportList != null)
     {
         return;
     }
     formExportList = new View.FormExportList();
     formExportList.ShowDialog();
     formExportList = null;
 }
 void notifyIcon1_Click(object sender, EventArgs e)
 {
     if (formExportList != null)
     {
         return;
     }
     formExportList = new View.FormExportList();
     formExportList.ShowDialog();
     formExportList = null;
 }