Create a Vista Gadget Using Visual Studio IDE (updated)

using System;
using System.Collections.Generic;
using System.Text;
using EnvDTE;
using EnvDTE80;
using System.IO;

namespace RunVistaGadget21.AdditionalApplicationsWrappers
{
    public class SigntoolRunner : ApplicationRunner
    {
        String SigntoolPath;
        String WindowsSDKDirectoryPath = String.Empty;        

        public SigntoolRunner(DTE2 applicationObject)
            : base(applicationObject, false)
        {

        }

        public SigntoolRunner(DTE2 applicationObject, bool isRunAsWinApp)
            : base(applicationObject, isRunAsWinApp)
        {

        }

        public override string GetAppArguments()
        {
            String PFXFilePath = gp.PfxFilePath;
            String Password = gp.PfxPassword;
            String TimeStampDllUrl = @"http://timestamp.verisign.com/scripts/timstamp.dll";
            String SigntoolArgs = String.Format(" sign /v /f {0} /p {1} /t {2}  {3}", PFXFilePath, Password, TimeStampDllUrl, GadgetPath);

            return SigntoolArgs;
        }

        public override string GetOutputAndRunApplication()
        {
            string SigntoolOutput = string.Empty;

            SigntoolPath = gp.SigntoolPath;
            if (File.Exists(SigntoolPath))
            {
                base.CalledApplicationPath = SigntoolPath;
                SigntoolOutput = base.GetOutputAndRunApplication();
            }
            else
            {
                SigntoolOutput = "Couldn't find signtool.exe file for signing gadget. Please, define path to 'signtool.exe'";
            }
            return SigntoolOutput;
        }

    }
}