private void ReferenceEnter_Button_Enter(object sender, EventArgs e)
 {
     if (ReferenceNumber_TextBox.Text == "")
     {
         ReferenceNumber_TextBox.Focus();
     }
 }
        /********************************************************************************************************************
        *
        * User Program: Job Data Start
        *
        ********************************************************************************************************************/

        private void User_Program_Job_Data_Load(object sender, EventArgs e)
        {
            SpotWeldID();
            ReferenceNumber_TextBox.Focus();

            ConnectToOPC.RunWorkerAsync();
            Scan_ListBox.Items.Add("Please Scan The Job Number");
            ItemID_TextBox.ReadOnly = true;
        }
 private void ReferenceNumber_TextBox_Enter(object sender, EventArgs e)
 {
     if (ReferenceNumber_TextBox.Enabled == true)
     {
         ReferenceNumber_TextBox.Focus();
     }
     else if (ReferenceNumber_TextBox.Enabled == false)
     {
         PartsNeeded_TextBox.Focus();
     }
 }
 private void Scan_ListBox_Enter(object sender, EventArgs e)
 {
     if (Scan_TextBox.Visible == true && Run_Button.Visible == false)
     {
         Scan_TextBox.Focus();
     }
     else if (Scan_TextBox.Visible == false && Run_Button.Visible == true)
     {
         Run_Button.Focus();
     }
     else if (Scan_TextBox.Visible == false && Run_Button.Visible == false)
     {
         ReferenceNumber_TextBox.Focus();
     }
 }