ASP.NET Paypal Integration for Subscription - VB.NET

Hello, I'm looking for ASP.NET example pages that allows users of my Site to enroll to a monthly subcription with Paypal, based on user licences selected by user. Also a page in my site that allows to Cancel an existing subcription and give a confirmation to user. If the user wants to buy the subcription again can do it with the same account. I prefer to have my own pages, use Paypal pages less possible. The expected deliverables are: --No graphical, but fully functional ASP.NET pages that contains all the screen and logic necessary to performed the work described. --Basic document that explains basic functionality of each page and interactions. --To give you an idea of possible pages that will be created, the expected functionality is: Register User (my local DB), Select Subscription (with trial period of 30 days), Enroll & Enter Payment Information for Subscription, Cancel Subscription, Update Payment Information (not sure if this is a PayPal screen or a custom screen created in my site). My website will have its own database for User Registration and Application, if you need to create an example database to perform any type of requirement for this paypal integration you can do it or create tblUsers, tblPurchases, as needed. I will copy all that logic to my application. I found a lot of free stuff and code on Internet for Paypal Integration, but I'm looking for somebody that knows perfectly exactly what I need and provide clean solution for my requirements. I know that Paypal have Paypal buttons for Subcription. If you think that I can resolve my requirements with Paypal Buttons let me know, but I prefer to have a more personalized experience for my users. Let me know any special requirements needed, if any, to make this proyect possible. Example: Have a Merchant Account, or somethink. I currently have a Paypal account only, I prefer to use PayPal only, but dont know if I have any limitation doing in that way. Thanks.