Return page buy now variables

[KBdev]

I have a simple buy now button with a few options underneath. All I need in my php or asp return page is the value of the drop down, then I can display the message that I want to. In the buy now form I have set the "rm" value to "2" (to switch from GET to POST) with the return url that I want. Can I request.form the os0, os1 etc values in my return page? Do I need to also turn on IPN or PDT? Or can I leave these off? Thank you.

[solace2000]

Yes, you need to turn on IPN or if you prefer you can use PDT to get the variables in the return URL and display your message accordingly

IPN code samples are here: https://github.com/paypal/ipn-code-samples