Wordpress and IPN

I've been scouring the net for some tutorials on intergrating paypal IPN into wordpress for a plugin I'm making, however, I've had no luck so far. Does anyone have experience with intergrating IPN into a wordpress plugin? I've coded all the rest of my plugin fine. All I need is to sort out the IPN.

Many thanks in advance

 

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Thanks for your reply, but I'm not after a plugin, only the information on how to include IPN in my own plugin. How did you include the IPN in your plugin?

 

may be this can help you http://franklinbishop.net/paypal-plugins-for-wordpress/ see Misiek Paypal