using CefRegisterExtension of delphichromiumembedded component on Borland C++ ?

Question

Hi I compiled the delphichromiumembedded using Borland Studio 2006 (c++) , and tried to use the CefRegisterExtension that in the ceflib.dll , I translate the Delphi code of the Execute function to C++ but seems that this doesn't work ,

I did it using the GetInterface of DelphiInterface Class. here is a sample code , if somebody know how to do it please answer , thanks .

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TCefv8ValueRef* y = new TCefv8ValueRef(FTestParam);
        y->GetInterface(retval);