Custom reshape polyline edit task
Application\EditingForm.cs
// Copyright 2010 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.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

using ESRI.ArcGIS.Controls;
using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.SystemUI;
using ESRI.ArcGIS.DataSourcesFile;
using ESRI.ArcGIS.Geodatabase;

namespace EditingSampleApp
{
    public partial class EditingForm : Form
    {

        #region class private members
        private IToolbarMenu m_toolbarMenu;       

        #endregion
        
        public EditingForm()
        {
            InitializeComponent();
        }

        private void EngineEditingForm_Load(object sender, EventArgs e)
        {
           
            //Set buddy controls
            axTOCControl1.SetBuddyControl(axMapControl1);
            axEditorToolbar.SetBuddyControl(axMapControl1);
            axToolbarControl1.SetBuddyControl(axMapControl1);

            //Add items to the ToolbarControl
            axToolbarControl1.AddItem("esriControls.ControlsOpenDocCommand", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axToolbarControl1.AddItem("esriControls.ControlsSaveAsDocCommand", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axToolbarControl1.AddItem("esriControls.ControlsAddDataCommand", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);            
            axToolbarControl1.AddItem("esriControls.ControlsMapZoomInTool", 0, -1, true, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axToolbarControl1.AddItem("esriControls.ControlsMapZoomOutTool", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axToolbarControl1.AddItem("esriControls.ControlsMapPanTool", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axToolbarControl1.AddItem("esriControls.ControlsMapFullExtentCommand", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axToolbarControl1.AddItem("esriControls.ControlsMapZoomToLastExtentBackCommand", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axToolbarControl1.AddItem("esriControls.ControlsMapZoomToLastExtentForwardCommand", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
           
            //Add items to the custom editor toolbar          
            axEditorToolbar.AddItem("esriControls.ControlsEditingEditorMenu", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axEditorToolbar.AddItem("esriControls.ControlsEditingEditTool", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axEditorToolbar.AddItem("esriControls.ControlsEditingSketchTool", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axEditorToolbar.AddItem("esriControls.ControlsUndoCommand", 0, -1, true, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axEditorToolbar.AddItem("esriControls.ControlsRedoCommand", 0, -1, false, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axEditorToolbar.AddItem("esriControls.ControlsEditingTargetToolControl", 0, -1, true, 0, esriCommandStyles.esriCommandStyleIconOnly);
            axEditorToolbar.AddItem("esriControls.ControlsEditingTaskToolControl", 0, -1, true, 0, esriCommandStyles.esriCommandStyleIconOnly);
           
            //Create a popup menu
            m_toolbarMenu = new ToolbarMenuClass();
            m_toolbarMenu.AddItem("esriControls.ControlsEditingSketchContextMenu", 0, 0, false, esriCommandStyles.esriCommandStyleTextOnly);

            //share the command pool
            axToolbarControl1.CommandPool = axEditorToolbar.CommandPool;
            m_toolbarMenu.CommandPool = axEditorToolbar.CommandPool;

            //Create an operation stack for the undo and redo commands to use
            IOperationStack operationStack = new ControlsOperationStackClass();
            axEditorToolbar.OperationStack = operationStack;

            //add some sample line data to the map
            IWorkspaceFactory workspaceFactory = new ShapefileWorkspaceFactoryClass();
            //relative file path to the sample data from EXE location
            string filePath = @"..\..\..\..\data\USAMajorHighways";
           
            IFeatureWorkspace workspace = (IFeatureWorkspace)workspaceFactory.OpenFromFile(filePath, axMapControl1.hWnd);

            IFeatureLayer featureLayer = new FeatureLayerClass();
            featureLayer.Name = "Highways";
            featureLayer.Visible = true;
            featureLayer.FeatureClass = workspace.OpenFeatureClass("usa_major_highways");

            axMapControl1.Map.AddLayer((ILayer)featureLayer);
            

        }


        private void axMapControl1_OnMouseUp(object sender, IMapControlEvents2_OnMouseUpEvent e)
        {
            if (e.button == 2) m_toolbarMenu.PopupMenu(e.x, e.y, axMapControl1.hWnd);

        }  

    }
}