void Test_Screen_Opened(System.Object sender, System.EventArgs e)
 {
     Globals.Tags.Max_Pressure.Value = 0;
     Globals.Tags.TestTimer.Value    = 0;
     TrendViewer.ShowHistory("On");
     TrendViewer1.ShowHistory("On");
 }
 void AnalogNumeric_ValueChanged(System.Object sender, Core.Api.DataSource.ValueChangedEventArgs e)
 {
     if (!Globals.Tags.Testing_Proc.Value)
     {
         TrendViewer.ShowHistory("On");
         TrendViewer1.ShowHistory("On");
         this.Enable_Buttons();
     }
     else if (Globals.Tags.Testing_Proc.Value)
     {
         TrendViewer.ShowHistory("Off");
         TrendViewer1.ShowHistory("Off");
     }
 }