Hello,

i have an assembly which is developped in C#.NET. The assembly provides two classes, one class has a method which accepts an instance of the other class as a parameter, like this:

[ClassInterface(ClassInterfaceType.AutoDispatch)]
public class clsOne
{
public clsOne() {}
}

[ClassInterface(ClassInterfaceType.AutoDispatch)]
public class clsTwo
{
public clsTwo() {}

public void test(clsOne cOne)
{
}
}

Now i create and register an COM-Typelib with RegAsm.exe. After this, i can create instances from both classes in Visual Basic 6. But if i create an instance of clsOne and clsTwo, and call the method "test" in clsTwo with the instance from clsOne, this clsOne-instance is NULL, when the assembly finally gets it.

private sub test()
Dim cOne as New clsOne
Dim cTwo as New clsTwo

Call cTwo(cOne)
end sub

cOne is NULL is this case when the assembly gets the parameter. Why? Do i have to declare anything else?

Thanks in advance for help.

Regards,
Eco