call back to C# function from within VBScript run with msscript.ocx

Question

I want to use msscript.ocx to call VBScript from C#, and allow the VBScript code to call back to functions in the C# program.

For example, in the following VBScript code, Clicktext is a custom C# function in the same clsss that is using msscript.ocx to run the VBScript.

For i=0 to i=4

    Clicktext("Auto")

Next

The Clicktext function shoud be called 5 times.

Is there any way to do it?

Something like this stackoverflow.com/questions/12118077/… — I4V
– I4V, Commented May 4, 2013 at 20:12

Ekkehard.Horner · Accepted Answer · 2013-05-05 10:55:52Z

2

This ComVisible console application with a reference to Interop.MSScriptControl:

// !! http://sandsprite.com/blogs/index.php?uid=11&pid=83

using System;
using MSScriptControl;

//class test has to support IDispatch to AddObject(). So make the assembly ComVisible
//via AssemblyInfo.cs or [assembly: System.Runtime.InteropServices.ComVisible(true)]

namespace MsScTest {
    public class CsHelper {
        public int increment(int y) { return ++y; }
    }

    class Program {
        public static MSScriptControl.ScriptControl sc = new ScriptControl();
        static void Main(string[] args) {
            sc.Language = "VBScript";
            sc.AddObject("CsHelper", new CsHelper(), true);
            sc.AddCode(@"
Function inc(n)
  inc = CsHelper.increment(n)
End Function
MsgBox inc(4711), 0, 'With a little help from my friend CsHelper'
".Replace("'", "\""));
            return;
        }
    }
}

pudding:

---------------------------
With a little help from my friend CsHelper
---------------------------
4712
---------------------------
OK   
---------------------------

demonstrates how to call a method of a C# object from VBScript code added to a MSScriptControl.

answered May 5, 2013 at 10:55

Ekkehard.Horner

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2 Comments

Jaskaran Over a year ago

Thanks a lot Horner!! The solution provided by you worked for me.

SoLaR Over a year ago

Just one big notice: adding derived classes as script Object's may end up as major screwup. I was adding class derived from Form. And method on that class was never called. As soon I removed ": Form" code started working. PS: above code helped me locate this problem, so +1 ;)

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