Those are registry entries. Delphi compiles this code into an OLE control which is uniquely identified by this ID.

They aren't registry entries...they just have the same format..i.e. 128 bit unique numbers It's NOT just for the generation of OLE controls which I agree is highly platform specific...

Interfaces just allow you to expose the many faces of a binary(not source) object and do it in an easy to program fashion....It's all possible with GPC as it stands it just take 3 times as long.

D/COM is growing in platform support(Win, Mac UNIX) (you could support it on an embedded system eventually) but it's not the only use of interfaces...you could use them to write your own OOP OS if you wanted, using nothing more than the defintion of IUnknown...

Anyway, all of this is Windoze-only code.

Absolutely not. It's the first/only genuinely good & platform independant idea to come out of MS..make you wonder who they stole it from....

Considering the platform-independant spirit of GPC, this is *not* the way to go, IMHO.

Perhaps it's not. There aren't that many folk using this kind of stuff yet for anything other than Windows but that's because they haven't twigged yet...

Dave

Dave Fiddes, CALM Software Production Officer Department of Mathematics, Heriot-Watt University, Edinburgh email D.J.Fiddes@hw.ac.uk - Tel: 0131-451-3251