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

[Lombra]

You can easily do this using the builtin chat filtering system.

ChatFrame_AddMessageEventFilter("CHAT_MSG_WHISPER", function(frame, event, message, sender, ...)
	if message == "!stats" then
		SendChatMessage("Your stats are terrible.", "WHISPER", nil, sender)
		return true
	end
end)

[SDPhantom]

I've noticed many custom chat addons that replace the chatframes don't use Blizzard's chat filter system. This isn't guaranteed to work if a user is running one.

Chat filters also can run multiple times according to how many frames are set to receive whisper events. On the same note, if no chatframes are registered to receive whispers, the filter will never run. If you need to reliably have code run regardless of user settings or conflicts with other addons, you need to handle the event yourself.

local EventFrame=CreateFrame("Frame");
EventFrame:RegisterEvent("CHAT_MSG_WHISPER");-- Need to register an event to receive it
EventFrame:SetScript("OnEvent",function(self,event,msg,sender)
    if msg:lower():find("!stats") then--    We're making sure the command is case insensitive by casting it to lowercase before running a pattern check
        SendChatMessage("Your response here","WHISPER",nil,sender);
    end
end);

[SimplyPresent]

Yeah, didn't know I actually had to get the whisper shown to send the reply. Thanks a LOT.
You two saved me from a mess of annoyance.