Creating Context Menu using ArcObjects?

Question

How can i create a context menu on Arcgis Desktop.And after creating it,how can i use it while a base command is open and active.I use C# but i can understand visual basic.

Answer 1

To instantiate it pass mapcontrol.Object as the parameter to the constructor.

using System;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.Controls;
namespace MapLibrary.ContextMenus
{
 /// <summary>
 /// Context menu class for Engine applications.
 ///</summary>
 [Guid("d71c6409-7f8b-4f23-95ed-12ba0d461920")]
 [ClassInterface(ClassInterfaceType.None)]
 [ProgId("MapLibrary.ContextMenus.BasicContextMenu1")]
 public class BasicContextMenu1
 {
 private IToolbarMenu2 m_toolbarMenu = null;
 private bool m_beginGroupFlag = false;
 public BasicContextMenu1(object hook)
 {
 this.SetHook(hook); 
 }
 public void SetHook(object hook)
 {
 m_toolbarMenu = new ToolbarMenuClass();
 m_toolbarMenu.SetHook(hook);
 AddItem("esriControls.ControlsMapZoomInTool", -1);
 AddItem("esriControls.ControlsMapZoomOutTool", -1);
 AddItem("esriControls.ControlsMapFullExtentCommand", -1);
 AddItem("esriControls.ControlsMapPanTool", -1);
 AddItem("esriControls.ControlsMapIdentifyTool", -1);
 }
 public void PopupMenu(int X, int Y, int hWndParent)
 {
 if (m_toolbarMenu != null) m_toolbarMenu.PopupMenu(X, Y, hWndParent);
 }
 public IToolbarMenu2 ContextMenu
 {
 get
 {
 return m_toolbarMenu;
 }
 }
 private void BeginGroup()
 {
 m_beginGroupFlag = true;
 }
 private void AddItem(UID itemUID)
 {
 m_toolbarMenu.AddItem(itemUID.Value, itemUID.SubType, -1, m_beginGroupFlag, esriCommandStyles.esriCommandStyleIconAndText);
 m_beginGroupFlag = false; //Reset group flag
 }
 private void AddItem(string itemID, int subtype)
 {
 UID itemUID = new UIDClass();
 try
 {
 itemUID.Value = itemID;
 }
 catch
 {
 itemUID.Value = Guid.Empty.ToString("B");
 }
 if (subtype > 0)
 itemUID.SubType = subtype;
 AddItem(itemUID);
 }
 private void AddItem(Guid itemGuid, int subtype)
 {
 AddItem(itemGuid.ToString("B"), subtype);
 }
 private void AddItem(Type itemType, int subtype)
 {
 if (itemType != null) AddItem(itemType.GUID, subtype);
 }
 }
}

Answer 2

There is at least a sample in your installation directory. I dont remember the name of the sample but you should have no difficulty in finding it