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Asked: 2026-06-09T22:24:24+00:00

I have my C#.net class library( MyLib.dll ). MyLib.dll is calling other third party

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I have my C#.net class library(MyLib.dll). MyLib.dll is calling other third party dll(Other.dll) file which is added through reference to my class library(MyLib.dll).

Now the problem is that MyLib.dll is to be used in vb 6.0.

I’ve registered MyLib.dll to enable COM and also i’ve set the Register for COM Interop option in Properties of my Class Library.

Also I’ve generated .tlb file for MyLib.dll (using Regasm)and for Other.dll to make them visible in COM.
I could see both the MyLib and Other in References of vb6.

The methods in the MyLib are visible but methods in Other are not visible when opened with vb6.

I’ve also tried to place MyLib in GAC but Other.dll(Third party dll) doesnot support vb6, it only supports for C#.net as well as VB.Net.

How to make the methods in the Other.dll visible in vb6.

Is there any way to make the methods in the third party dll to visible?

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1 Answer

  1. Editorial Team

    So, if I understood you correctly, MyLib.dll is visible from COM, but Other.dll is not. But, if Other.dll is visible from MyLib.dll you could use MyLib.dll as a bridge between Other.dll and COM.

    Say Other.dll has a void Foo(int x, string y) function you want exposed to COM. Make a function on MyLib.dll like so

    public void Foo(int x, string y)
{
    Other.Foo(x, y);
}

    Would’t this work?

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