Add map surrounds using the SymbologyControl
SymbolForm.cs
// Copyright 2012 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Controls;

namespace AddMapSurrounds
{
  public class SymbolForm : System.Windows.Forms.Form
  {
  
    private System.ComponentModel.Container components = null;
    private System.Windows.Forms.Button button1;
    private System.Windows.Forms.Button button2;
    private ESRI.ArcGIS.Controls.AxSymbologyControl axSymbologyControl1;

    private IStyleGalleryItem m_styleGalleryItem;

    public SymbolForm()
    {
      InitializeComponent();
    }

    protected override void Dispose( bool disposing )
    {
      if( disposing )
      {
        if(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()
    {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(SymbolForm));
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.axSymbologyControl1 = new ESRI.ArcGIS.Controls.AxSymbologyControl();
            ((System.ComponentModel.ISupportInitialize)(this.axSymbologyControl1)).BeginInit();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(287, 236);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 6;
            this.button1.Text = "OK";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(287, 270);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(75, 24);
            this.button2.TabIndex = 7;
            this.button2.Text = "Cancel";
            this.button2.Click += new System.EventHandler(this.button2_Click);
            // 
            // axSymbologyControl1
            // 
            this.axSymbologyControl1.Location = new System.Drawing.Point(7, 7);
            this.axSymbologyControl1.Name = "axSymbologyControl1";
            this.axSymbologyControl1.OcxState = ((System.Windows.Forms.AxHost.State)(resources.GetObject("axSymbologyControl1.OcxState")));
            this.axSymbologyControl1.Size = new System.Drawing.Size(275, 287);
            this.axSymbologyControl1.TabIndex = 8;
            this.axSymbologyControl1.OnItemSelected += new ESRI.ArcGIS.Controls.ISymbologyControlEvents_Ax_OnItemSelectedEventHandler(this.axSymbologyControl1_OnItemSelected);
            // 
            // SymbolForm
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(372, 346);
            this.Controls.Add(this.axSymbologyControl1);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
            this.Name = "SymbolForm";
            this.Text = "Symbol Form";
            this.Load += new System.EventHandler(this.Form2_Load);
            ((System.ComponentModel.ISupportInitialize)(this.axSymbologyControl1)).EndInit();
            this.ResumeLayout(false);

    }
    #endregion

    private void Form2_Load(object sender, System.EventArgs e)
    {
      //Get the ArcGIS install location
            string sInstall = ESRI.ArcGIS.RuntimeManager.ActiveRuntime.Path;
      
      //Load the ESRI.ServerStyle file into the SymbologyControl
      axSymbologyControl1.LoadStyleFile(sInstall + "\\Styles\\ESRI.ServerStyle");
    }

    public IStyleGalleryItem GetItem(ESRI.ArcGIS.Controls.esriSymbologyStyleClass styleClass)
    {
      m_styleGalleryItem = null;
       
      //Set the style class of SymbologyControl1
      axSymbologyControl1.StyleClass = styleClass; 
      
      //Change cursor
      this.Cursor = Cursors.Default;

      //Show the modal form
      this.ShowDialog();

      //return the label style that has been selected from the SymbologyControl
      return m_styleGalleryItem;
    }

    private void axSymbologyControl1_OnItemSelected(object sender, ESRI.ArcGIS.Controls.ISymbologyControlEvents_OnItemSelectedEvent e)
    {
      //Get the selected item
      m_styleGalleryItem = (IStyleGalleryItem) e.styleGalleryItem;
    }

    private void button1_Click(object sender, System.EventArgs e)
    {
      //hide the form
      this.Hide(); 
    }

    private void button2_Click(object sender, System.EventArgs e)
    {
      m_styleGalleryItem = null;
      //hide the form
      this.Hide(); 
    }
    
  }
}