partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.lookUpEdit1 = new DevExpress.XtraEditors.LookUpEdit();
            ((System.ComponentModel.ISupportInitialize)(this.lookUpEdit1.Properties)).BeginInit();
            this.SuspendLayout();
            // 
            // lookUpEdit1
            // 
            this.lookUpEdit1.Location = new System.Drawing.Point(79, 93);
            this.lookUpEdit1.Name = "lookUpEdit1";
            this.lookUpEdit1.Properties.Buttons.AddRange(new DevExpress.XtraEditors.Controls.EditorButton[] {
            new DevExpress.XtraEditors.Controls.EditorButton(DevExpress.XtraEditors.Controls.ButtonPredefines.Combo)});
            this.lookUpEdit1.Properties.Columns.AddRange(new DevExpress.XtraEditors.Controls.LookUpColumnInfo[] {
            new DevExpress.XtraEditors.Controls.LookUpColumnInfo("Test", "测试", 20, DevExpress.Utils.FormatType.None, "", true, DevExpress.Utils.HorzAlignment.Default, DevExpress.Data.ColumnSortOrder.None)});
            this.lookUpEdit1.Properties.DisplayMember = "Test";
            this.lookUpEdit1.Properties.NullText = "";
            this.lookUpEdit1.Properties.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.Standard;
            this.lookUpEdit1.Properties.ValueMember = "Test";
            this.lookUpEdit1.Size = new System.Drawing.Size(253, 21);
            this.lookUpEdit1.TabIndex = 0;
            this.lookUpEdit1.ProcessNewValue += new DevExpress.XtraEditors.Controls.ProcessNewValueEventHandler(this.lookUpEdit1_ProcessNewValue);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(488, 379);
            this.Controls.Add(this.lookUpEdit1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.lookUpEdit1.Properties)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private DevExpress.XtraEditors.LookUpEdit lookUpEdit1;
    }
/////////////////////////////////////////////////////////////////////
public partial class Form1 : DevExpress.XtraEditors.XtraForm
    {
        public Form1()
        {
            InitializeComponent();
        }

        DataTable dt; 

        private void Form1_Load(object sender, EventArgs e)
        {
            dt = new DataTable();
            dt.Columns.Add("Test", typeof(string));

            DataRow dr = dt.NewRow();
            dr[0] = "Hello,World";
            dt.Rows.Add(dr);

            lookUpEdit1.Properties.DataSource = dt; 

        }

        private void lookUpEdit1_ProcessNewValue(object sender, DevExpress.XtraEditors.Controls.ProcessNewValueEventArgs e)
        {
            if (MessageBox.Show(this, "Add the '" + e.DisplayValue.ToString() + "' entry to the list?", "Confirm", MessageBoxButtons.YesNo) == DialogResult.Yes)
            {
                //(lookUpEdit1.Properties.DataSource as ContactList).Add(new Contact(e.DisplayValue.ToString())); 
                DataRow dr = dt.NewRow();
                dr[0] = e.DisplayValue.ToString();
                (lookUpEdit1.Properties.DataSource as DataTable).Rows.Add(dr);
                e.Handled = true;
            } 

        }
    }