.NET/COM Interop array passing

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C++

C#

interop

How do I return an array of doubles from a managed .NET C# object to unmanaged c++ COM code?

If in C# i define a class as: (and tell visual studio to make the assembly COM visible)

public interface _myinterface
{
    public double[] getDoubles()
}
public class myinterface: _myinterface
{
    public double[] getDoubles()
    {
        double[] doubles;
        doubles = new double[10];
        // set values here
        return doubles;
    }
}

I'm ending up with a type library declaration of:

SAFEARRAY(double) getDoubles();

and when i create a C++ class in visual studio 2008 based on the type library i get:

SAFEARRAY * getDoubles()
{
    InvokeHelper(0x6002000a, DISPATCH_METHOD, VT_EMPTY, NULL, NULL);
}

which doesn't even compile because it is not returning a value.

Does what i'm attempting here make sense and/or is there a different way to do this that will yield better results?

Thanks,
Barry