Adding a whisper message

[SimplyPresent]

Hey guys, I'm currently running the addon Cross Gambler, I want to add in a whisper function where there is a trigger word for !stats to the user to receive their current win or loss record. I can't seem to be able to activate the trigger word. Would someone be able to help me out? (new to this, taking over this project)

If you want to check out the addon, here it is.
http://www.curse.com/addons/wow/cross-gambling