public event EventHandler<CTInterfaceButtonFuncArgs> OnAfterButtonFunction

Public Event OnAfterButtonFunction As EventHandler(Of CTInterfaceButtonFuncArgs)

// @auto-reference {[CT_INSTALL_PATH]\CTInterface.dll}
// @auto-reference {[CT_INSTALL_PATH]\Interop.CTEngineLib.dll}
// @auto-reference {C:\Windows\Microsoft.NET\Framework\v4.0.30319\System.Data.dll}
// @auto-reference {C:\Windows\Microsoft.NET\Framework\v4.0.30319\System.Windows.Forms.dll}


using System;
using System.IO;
using System.Data;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Linq;
using System.Windows.Forms;

using ATR.CT.CTInterface;
using CTEngineLib;

namespace CUSTOMTOOLS.APIExample
{
  public class ManufacturingTime
  {
    private CTInterface _ctInterface;

    public ManufacturingTime(ATR.CT.CTInterface.CTInterface ctInterface)
    {
      _ctInterface = ctInterface;
      _ctInterface.OnAfterButtonFunction += _ctInterface_OnAfterButtonFunction;
    }

    /// <summary>
    /// Called after the dialog box associated with button function is closed by user.
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e">Information about button function and properties having "Allow scripting"
    /// set in CUSTOMTOOLS</param>
    void _ctInterface_OnAfterButtonFunction(object sender, CTInterface.ButtonFuncArgs e)
    {
      // We are only interested in user scope custom 1 data which has job stages defined
      // in CUSTOMTOOLS profile we are using
      if(e.ButtonFunctionResult == ButtonFunctionResult.DialogOk && 
        e.ButtonFunction == ctButtonFunction.ctButtonFunctionGetUserScopeData)
      {
        // Job stages are in XML form in matrix data
        string totalManufacturingTime = GetTotalManufacturingTime(e.Property.MatrixData).ToString();
        // Value needs to be changed through e.Properties in order to update it in UI
        ICustomProperty manuTime = e.Properties.SingleOrDefault(p => p.Property.ID == e.Property.Property.ID);
        if(manuTime != null && manuTime.OriginalValue != totalManufacturingTime)
        {
          manuTime.Value = totalManufacturingTime;
        }
      }
    }

    /// <summary>
    /// Calculates total manufacturing time for item by summing up time on each job stage row
    /// </summary>
    /// <param name="jobStages">Defined job stages as XML</param>
    /// <returns>Summed up manufacturing time when successful; otherwise 0</returns>
    private int GetTotalManufacturingTime(string jobStages)
    {
      try
      {
        int totalTime = 0;

        XDocument jobStagesXML = XDocument.Parse(jobStages);

        IEnumerable<XElement> jobTimes =  
          from field in jobStagesXML.Descendants("field")  
          where (string)field.Attribute("name") == "job_time"  
          select field;
        foreach(var time in jobTimes)
        {
          int stageTime = 0;
          if(int.TryParse(time.Value, out stageTime))
          {
            totalTime += int.Parse(time.Value);
          }
        }

        return totalTime;
      }
      catch(Exception ex)
      {
        MessageBox.Show(string.Format("An error occurred while calculating manufacturing time:{0}{1}",
          Environment.NewLine, ex.Message));
      }
      return 0; // Default
    }
  }
}