Expose .Net (c#) DLL Assembly COM

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:

Class:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Runtime.InteropServices;

namespace dllProtheus

{

[Guid("5B38DC58-E9E4-11E4-B496-C4621D5D46B0")]

[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]

public interface IExecInClientDLL

{

[DispId(1)]

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

}

[Guid("69C68270-E9E4-11E4-B493-CB621D5D46B0")]

[ClassInterface(ClassInterfaceType.None)]

[ComSourceInterfaces(typeof(IExecInClientDLL))]

[ProgId("dllProtheus.TesteDLL")]

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: 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("1.0.0.0")]

[assembly: AssemblyFileVersion("1.0.0.0")]

[assembly: NeutralResourcesLanguageAttribute("en")]

4 Replies

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Achal Kumar10y ago
Hi,
You haven't made your interface and class as com exposable. Try adding attribute ComVisible(true) to your interface and class.

Regards,
Achal
Gowtham Rajamanickam11y ago
try dllProtheus.ExecInCleintDLL
renan paiva11y ago
I tried remove the namespace as you suggest but the same result, I can't call my DLL in a unmanaged solution.

Thanks for you time.

I still need help.
Suthish Nair11y ago
I guess, you should try dllProtheus.ExecInCleintDLL. Or just remove the namespace and use only the class name.