How to call WebService from PB7

[CC]

Hi,

We have a window application which is developed in PB7 and Ms SQL 2000
database. It is a typical thin client/fat server application since all
the business logic is running in stored procedure and trigger.

My management want to try on N-tier architecture. They propose to use
Microsoft .Net WebService to wrappe all the business logic. And these
webservice will be called by internet application developed in ASP.Net
and the window application which still remain in PB7.

My question are:
1.) Is this architecture feasible/workable? If not, any suggestion or
recommendation?
2.) How to call the webservice from PB7? Any example please?

Thanks in advance!

Chin Choon