Hi guys. 

Can anyone help me with a code to auto close tasks in the purchase order module. My coding aptitude is not that good but i am wanting to learn more

So when a purchase order is created it then creates a task. So what i want to do is to auto close the task associated with the purchase order when its approved.

Secondly, on that stage where it says pending, it locks the order but i want the order to be locked when its approved that way noone can edit it