Form1.cs

using DevExpress.XtraEditors;
using DevExpress.XtraEditors.Controls;
using System;
using System.ComponentModel;
using System.Windows.Forms;

namespace PivotGridDrillDownDataExample
{
    public partial class Form1 : XtraForm
    {
        public Form1()
        {
            InitializeComponent();
            pivotGridControl1.BestFit();
            repositoryItemPopupContainerEdit1.QueryPopUp += repositoryItemPopupContainerEdit1_QueryPopUp;
            repositoryItemPopupContainerEdit1.CloseUp += repositoryItemPopupContainerEdit1_CloseUp;
            repositoryItemPopupContainerEdit1.PopupControl = CreatePopupControl();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'nwindDataSet.SalesPerson' table. You can move, or remove it, as needed.
            this.salesPersonTableAdapter.Fill(this.nwindDataSet.SalesPerson);

        }

        private PopupContainerControl CreatePopupControl()
        {
            PopupContainerControl result = new PopupContainerControl();
            DrillDownControl ddc = new DrillDownControl();
            ddc.Name = "DrillDownControl";
            ddc.Dock = DockStyle.Fill;
            result.Size = ddc.Size;
            result.Controls.Add(ddc);
            return result;
        }

        private void repositoryItemPopupContainerEdit1_QueryPopUp(object sender, CancelEventArgs e)
        {
            PopupContainerEdit editor = (PopupContainerEdit)sender;
            DrillDownControl ddc =
                (DrillDownControl)editor.Properties.PopupControl.Controls["DrillDownControl"];
            ddc.DataSource = pivotGridControl1.Cells.GetFocusedCellInfo().CreateDrillDownDataSource();

        }

        private void repositoryItemPopupContainerEdit1_CloseUp(object sender, CloseUpEventArgs e)
        {
            PopupContainerEdit editor = (PopupContainerEdit)sender;
            DrillDownControl ddc =
                (DrillDownControl)editor.Properties.PopupControl.Controls["DrillDownControl"];
            if (ddc.DataSource != null)
            {
                ((IDisposable)ddc.DataSource).Dispose();
                ddc.DataSource = null;
            }
        }
    }
}