>Hell Eric, anyone can create their own parameter string schema and parser. For example, my of my framework classes accept an array in the Init and, if evaluated as an array, is parsed to set (or add) properties.
>

The difference is that this is a defined standard and that all of the messaging happens in a single XML document. That document doesn't have to be created by another Win32 app. Your framework class has to be called by a VFP routine, or a COM savvy client.