Hi,

I have a DLL that I did using C# and I would like to use it from my script.

I have already tried the Interop.Call method but It does not work.

Can someone please point out how can this be done ? I mean, how can I use the DLL in my script.

Thanks in advance,

Interaction with C# DLLs should be done with COM, not with Interop.Call. You need to make your classes and methods "ComVisible" so that they are exposed for COM in the DLL. Have a look at trying to create a c# COM server.

If you want your C# project to interact with the Plus! objects (Messenger, MsgPlus,...), see if you can find something in this Tutorial on How to Let a Script-Callable DLL Handle Scripting Objects. It's written for C++, but you should be able to do the same in C# as well.

Hi, I tested what you suggested but I get the following error:

Automation server can't create object

And my ActiveX Object does not get created.

Any other suggestion?

Have you registered the DLL first?

Also what Matti said:

quote:

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Originally posted by Matti
Interaction with C# DLLs should be done with COM, not with Interop.Call. You need to make your classes and methods "ComVisible" so that they are exposed for COM in the DLL.

---

Hi, I created a new class just like the VB sample code.

using System;
using System.Runtime.InteropServices;
namespace MyDLL
{
    [ComVisible(true)]
    public class Operations
    {
        [ComVisible(true)]
        public string getValue1(string sParameter)
        {
            switch (sParameter)
            {
                case "a":
                    return "A was chosen";

                case "b":
                    return "B was chosen";

                case "c":
                    return "C was chosen";

                default:
                    return "Other";
            }
        }
        public string getValue2()
        {
            return "From VBS String Function";
        }
    }
}

And the I try to use it from jscript.

I have tried:
Interop.Call("C:\\Program Files\\Messenger Plus! Live\\Scripts\\MySecondScript\\MyDLL.dll", "getValue1", "a");
and I received the error: Interop.Call failed to locate function "getValue1"

I have also tried: var myObj = new ActiveXObject("MyDLL.Operations"); and I receive the error: unknown (code: -2147024894)

Did you regasm the dll to register it?

quote:

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COM classes must have a parameterless Public Sub New() constructor, or the class will not register correctly

---

quote:

---

Originally posted by felipEx

quote:

---

COM classes must have a parameterless Public Sub New() constructor, or the class will not register correctly

---

Walkthrough: Creating COM Objects with Visual Basic .NET

---

quote:

---

Originally posted by CookieRevised

quote:

---

Originally posted by felipEx

quote:

---

COM classes must have a parameterless Public Sub New() constructor, or the class will not register correctly

---

Walkthrough: Creating COM Objects with Visual Basic .NET

---

That only applies for VB.NET (right?).

He is using C#...

---

Spoiler:

C# code:

---

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
 
namespace MyDLL
{
    [ComVisible(true)]
    public class Operations
    {
        /// <summary>
        /// Parameterless constructor required in order to register correctly
        /// </summary>
        public Operations()
        {
        }
 
        public string getValue1(string sParameter)
        {
            switch (sParameter)
            {
                case "a":
                    return "A was chosen";
 
                case "b":
                    return "B was chosen";
 
                case "c":
                    return "C was chosen";
 
                default:
                    return "Other";
            }
        }
        public string getValue2()
        {
            return "From VBS String Function";
        }
    }
}

---

JScript code:

---

var x = new ActiveXObject("MyDLL.Operations");
Debug.Trace(x.getValue2());
x = null;

---

quote:

---

Originally posted by output
Script is starting
Script is now loaded and ready
Function called: OnEvent_Initialize
From VBS String Function

---

quote:

---

Originally posted by felipEx

quote:

---

Originally posted by CookieRevised

quote:

---

Originally posted by felipEx

quote:

---

COM classes must have a parameterless Public Sub New() constructor, or the class will not register correctly

---

Source: Walkthrough: Creating COM Objects with Visual Basic .NET

---

That only applies for VB.NET (right?).

He is using C#...

---

It doesn't matter at all if it's C#/VB.NET, COM classes must have a parameterless constructor in order to register correctly. Sorry if I wasn't clear in the first place

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There's a .NET class for exporting C# methods; the only problem I have with it, is that it doesn't work