renan paiva

renan paiva

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Expose .Net (c#) DLL Assembly COM

Apr 24 2015 9:13 AM
Hi everyone,

I have tried everything, read examples and etc, but I can't expose my DLL to COM Interop.

The project has a strong key added and checked the option Register for COM Interop but when I try to call my DLL in other apps says that can't find the entry point named ExecInClientDLL.

Could someone show me where I'm wrong?

Best regards,

Renan Paiva

Following my code:


using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Runtime.InteropServices;

namespace dllProtheus




    public interface IExecInClientDLL



        int ExecInClientDLL(int id, string parametro, string buffer, int bufferSize);







    public class TesteDLL : IExecInClientDLL



        public TesteDLL() { }


        public int ExecInClientDLL(int id, string parametro, string buffer, int bufferSize)


            buffer = "retorno da dll " + parametro;

            return 200;




My assembly:

using System.Reflection;

using System.Runtime.CompilerServices;

using System.Runtime.InteropServices;

using System.Resources;

// General Information about an assembly is controlled through the following 

// set of attributes. Change these attribute values to modify the information

// associated with an assembly.

[assembly: AssemblyTitle("dllProtheus")]

[assembly: AssemblyDescription("")]

[assembly: AssemblyConfiguration("")]

[assembly: AssemblyCompany("")]

[assembly: AssemblyProduct("dllProtheus")]

[assembly: AssemblyCopyright("Copyright ©  2015")]

[assembly: AssemblyTrademark("")]

[assembly: AssemblyCulture("")]

// 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("ccc6e7d6-c921-452f-9759-cc1bac0113b1")]

// Version information for an assembly consists of the following four values:


//      Major Version

//      Minor Version 

//      Build Number

//      Revision


// You can specify all the values or you can default the Build and Revision Numbers 

// by using the '*' as shown below:

// [assembly: AssemblyVersion("1.0.*")]

[assembly: AssemblyVersion("")]

[assembly: AssemblyFileVersion("")]

[assembly: NeutralResourcesLanguageAttribute("en")]

Answers (4)