Question

I have a console app, myapp.exe. Within the app is a function, let’s call it:

public static int AddIntegers(int a, int b)

Is it possible to make this function visible externally so that a VBscript could call it? Do I have to move the function into a DLL or can I leave it in the EXE and make it visible? If so, how?

Answer 1

Idealistically, you should be making a DLL and set Com Visible on the functions you need to expose.

using System;
using System.Runtime.InteropServices;
namespace MyDLL
{
   [ComVisible(true)]
   public class Operations
   {
       [ComVisible(true)]
       public int AddIntegers(int a, int b)
       {
           return a + b;
       }
    }
}

After you’ve compiled your DLL you need to register it with regasm.exe so that you can call it from VBScript:

Dim myObj
Set myObj = CreateObject("MyDLL.Operations")
Dim sum
sum = myObj.AddIntegers(3, 5)

This reply is based on the CodeProject posting How to call a .NET DLL from a VBScript by Raymund Macaalay. I recommend you read it.

Also, you should check other stackoverflow posting such as How to call C# DLL function from VBScript.