BUG: Add-ins not loaded from the command line in Visual Studio 2005 SP1

Author:	Carlos J. Quintero (Microsoft MVP)	Applies to:	Microsoft Visual Studio 2005 SP1
Date:	February 2007

Introduction

When you set a Visual Studio 2005 SP1 add-in to load when the IDE is started from the command line (for a build), the add-in is not loaded.

Cause

This is a bug of Visual Studio 2005 SP1.

More Information

Steps to reproduce the problem:

• Create a VS 2005 SP1 add-in with name "MyCommandLineAddin" using the wizard:
• In the page 4 of 6, mark the checkbox to execute the add-in from the command-line.
• Add this code for the add-in (when loaded, the add-in shows a message with the connection mode):

  Imports System
  Imports Extensibility
  Imports EnvDTE
  
  Public Class Connect
     Implements IDTExtensibility2
  
     Public Sub OnConnection(ByVal application As Object, ByVal connectMode As ext_ConnectMode, _
        ByVal addInInst As Object, ByRef custom As Array) Implements IDTExtensibility2.OnConnection
  
        System.Windows.Forms.MessageBox(connectMode.ToString())
  
     End Sub
  
     Public Sub OnDisconnection(ByVal disconnectMode As ext_DisconnectMode, ByRef custom As Array) _
        Implements IDTExtensibility2.OnDisconnection
     End Sub
  
     Public Sub OnAddInsUpdate(ByRef custom As Array) Implements IDTExtensibility2.OnAddInsUpdate
     End Sub
  
     Public Sub OnStartupComplete(ByRef custom As Array) Implements IDTExtensibility2.OnStartupComplete
     End Sub
  
     Public Sub OnBeginShutdown(ByRef custom As Array) Implements IDTExtensibility2.OnBeginShutdown
     End Sub
  
  End Class

• Build the add-in and close Visual Studio.
• Go to Start, Programs, Microsoft Visual Studio 2005, Visual Studio Tools and execute Visual Studio 2005 Command Prompt.
• In the DOS window that is opened, type the following command to compile a solution such as WindowsApplication1 from the command line:
  
  devenv.exe WindowsApplication1.sln /build Debug
• The solution is compiled but the add-in was not loaded (it didn't show the message box).

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