integrating orchestration to a web application

Hello

has anybody an idea how to use a bizTalk project. I mean, after making the orchestrations how can I consume them in a web application?

My application is OnlineBooks. The user enters the book info that he/she searches, into a web-page. This info is sent to book suppliers as a message, XML doc. Then the suppliers search for the book in their database. And they send the found book(s) info and price to OnlineBooks(OB) in a XML doc. And OB presents this info in a web-page to user.

OB -> supplier (BookRequest message)
supplier -> OB (BookResponse message)

I make this project with BizTalkOrchestrations and ASP.NET project.

After making orchestrations, how can I integrate it to web application?

by the way, thanks for the answers of my earlier configuration problem. as u guess, now it works? :))