private void updateScanStatus() { long ccount = stp.WorkItemsItemsProcessed(); long speed = ccount - lastcount; lastcount = ccount; this.lbl_usedtime.Text = this.scanTime.ToString(); this.lbl_waitCount.Text = (allscanCount - ccount).ToString(); this.lbl_scanedCount.Text = ccount.ToString(); this.lbl_speed.Text = speed.ToString(); }