Exposing .NET assembly as a COM object.

Exposing .NET Assemblies as COM components. - Trouble is that he suggest placing the .NET component in the GAC. The problem with this is that the assembly and all its dependencies must then have a strong name! Better expose on deploying .NET Assemblies as COM components Sourcing .Net events for COM Sinks Really Raising Events Handled by a C++ COM Sink Sinking events from managed code in unmanaged C++ This is the simple method that avoids the use of the GAC. In the 'AssemblyInfo.cs' file add the following:

// Setting ComVisible to false makes the types in this assembly not visible 
// to COM components.  If you need to access a type in this assembly from 
// COM, set the ComVisible attribute to true on that type.
[assembly: ComVisible(true)]

// The following GUID is for the ID of the typelib if this project is exposed to COM
[assembly: Guid("f23114e6-5754-4793-b2c2-8cbe299421ad")]

The .Net component should have the following form:

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;

namespace TestNETComComponent
{
   // Declare the interface
   [ComVisible(true), Guid("23661D34-4D5E-42e7-9992-CA64923E2221")]
   // No IDIspatch, only the simplest IUknown derived COM interface
   [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
   public interface ISomeInterface
   {
      int DoSomething();
      int DoSomethingElse(string arg);
   }

   // Need a class to implement the interface 
   [Guid("2AD6213C-0632-450b-8742-224913943C87")]
   [ProgId("Test.TestNETComComponent")]
   [ClassInterface(ClassInterfaceType.None)]
   public class TestNETCom : ISomeInterface
   {
      #region ISomeInterface Members

      public int  DoSomething()
      {
         Debug.WriteLine("TestNETCom.DoSomething()");
         return 1;
      }

      public int DoSomethingElse(string arg)
      {
     Debug.WriteLine("TestNETCom.DoSomethingElse() - " + m_SomeString);
         return 1;
      }

      #endregion
   }
}

Use this command line to register the assembly with COM and create the type library: regasm.exe /codebase /tlb TestNETComponent.dll To unregister the assembly: regasm.exe /unregister TestNETComponent.dll