Bank Payment with Application And WebService

[pers]

Hi all

I have a win application that interacts to my web application with web
services.
Part of my web site has online payment that connects to
a bank web service.
The Bank service wants some parameters including revertUrl ( the url that
bank send back information to).
I want to know that it's possible to connect to bank web service with my win
application and send parameters to and get information back?
My win application completely works with my web application except online
payment.
best regards.