IEXTENSION INTERFACE

// Code in ext.cs


using System;
using System.Drawing;
using System.Runtime.InteropServices;
using ESRI.ArcGIS.ADF.BaseClasses;
using ESRI.ArcGIS.ADF.CATIDs;
using ESRI.ArcGIS.Framework;
using ESRI.ArcGIS.ArcMapUI;
using ESRI.ArcGIS.esriSystem;

namespace NE_EXT
{
/// <summary>
/// Summary description for NEConvertExt.
/// </summary>
[Guid("d1bb6202-5f18-4509-977c-79aecfbf9c62")]
[ClassInterface(ClassInterfaceType.None)]
[ProgId("NE_EXT.NEConvertExt")]
public sealed class NEConvertExt : IExtension
{

private IApplication m_application;
IMxDocument pMxDoc;
string sMxdFileName = "C:\\Documents and Settings\\abc\\Desktop\\mXD'S\\abc.mxd";


#region IExtension Members

public string Name
{
get
{
return "ConvertToNEExtension";
}
}

public void Shutdown()
{
//throw new NotImplementedException();
m_application = null;
}

public void Startup(ref object initializationData)
{
m_application = initializationData as IApplication;
if (m_application == null)
return;
}

#endregion


public void CreateWorkorder(string WoName,string WoType)
{
}
public void OpenWorkorder(string WoName)
{
}
public void Convert(string strServer,string strInstance,string strUserName,string strVersion)
{
}

I wrote above code in IExtension class.




I want to access these Methods in another External Application ,for That

// Code in EXtApp.cs

if (!b_ArcMapStarted)
{
IDocument pDoc = new MxDocumentClass();
pApp = pDoc.Parent();
pApp.OpenDocument(sMxdFileName);//Opened a saved Mxd

pApp.Visible = false;

IExtension objExt; // Created I Extension Object
objExt = pApp.FindExtensionByName("ConvertToNEExtension");
if (objExt != null)
{
objExt.c// Here that methods are not accesible, I didn't get what's the problem is
}