I am a webmaster for a professional nonprofit organization which just opened an account at authorized.net. I have the api login id and the transaction key. The website has a form to collect all the credit card payment information. I need sample codes to pass the collected information to the payment gateway and get the response paramters so I can show on the users after they hit the submit button. In the past year, the organization used other gateway payment company and I am able to use POST form method to pass those parameters.
The web pages are bulit using ASP.