Henk,

> Is it possible to run ibserver.exe as a foreground program under window
> 2000?
> This would make it posible to run it in a debugger to step true udf dll's.

I think you just have to make sure it is not running and set it as the
host application for your DLL.
I haven't tried but I don't see any reason for this to not work.
Ciao
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_/\/ando