FNCSpreadGrid in WebCore

If I create a new WebCore project and drop an FNCSpreadGrid on the form there's no indication that anything is wrong (it's in the pallette and I can navigate to the VCL.TMSFNCSpreadGrid declaration) but when I try to run it I get "can't find unit VCL.TMSFNCSpreadGrid".

Is the FNCSpreadGrid compatible with WebCore?

Thanks, Bob