Autohotkey for Skype automated message

Hello there! I need an ahk script what scans the opening Skype windows. If if founds a new one with a new message then it respons (one constant message from ini file fe.). It should not send a message to a certain window (username) if it already sent a message in the last x minutes. I have heard of Pamela skype addon. That is not good for me. Also heard the Skype auto message function. :) Thank you!