Can I get an order confirmation from PayPal Standard without relying on the customer to click "Return to site" from PayPal? - asp.net-mvc

I need to do order processing upon confirmation of payment. Using PayPal Standard, is there a way I can get an order ID (that my site specifies) and a flag for whether the payment is received or not?
It appears that CMS's like Joomla have been able to do what I'm describing, but I haven't been able to find anything in PayPal Documentation that indicates how. Of course, I'm sure the answer is in there, and I will ontinue looking, but if someone could save me some time by pointing me in the correct direction, I would really appriciate it!
Just a little more information, I am developing this site in ASP.NET MVC with C#. I have also been researching PayPal IPN feature, but after talking to other developers in the office, they strongly recommend steering clear of IPN because of it's asynchronous nature.
Any thoughts?
Thanks for any help.

There are many ways to get information from PayPal. Essentially they break down into two categories, "push" and "pull".
"Push" is when PayPal pushes information to you. There are two ways that PayPal pushes information
Information sent in the URL when the customer returns to your site.
The IPN notifications.
"Pull" is when you request information from PayPal. PayPal provides a variety of APIs that you can use to get information about your transactions. So, for example, you could set up a job that runs every X minutes and asks PayPal for information about any orders that you know were sent to PayPal, but for which you didn't receive information on a return URL.
Here are a couple of links to get you started:
https://www.x.com/community/ppx/transaction_information
https://www.x.com/docs/DOC-1372

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Usually if I want to make a payment via PayPal through a Rails app, I prepare a payment form in a view and after clicking that is a user redirected to PayPal, where (s)he pay and is redirected back to the app.
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Ok so there is this feature that I would like to implement on my site. Users can choose to donate money to a specific nonprofit (let's say Wikipedia). So they click donate and they choose the amount on the website, get redirected to PayPal website, complete the transaction, and then get redirected to my website AFTER I get some Instant Notification, with which I track that donation in my website database with the users info.
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I am building a marketplace app for a client and need to be able to both send payments and receive payments. I am currently using ActiveMerchant to handle incoming payments, but I don't see anywhere in the documentation if it is possible to SEND payments. I've read elsewhere that it may in fact be possible to send payments using one of Paypal's many API's but I'm not sure which one I should be looking to use.
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I would look into Adaptive Payments it seems to offer something similar to what you are looking for. There is also a gem for it over here which seems to be actively developed.
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