[Everglow]

I actually couldn't get that to work, so I hooked the Chat_Frame_OnUpdate event handler, which is much simpler, and seems to work fine. hidden is just a boolean that indicates whether I'm hiding the frames or not. Thanks again for the input.

 
local ORIG_ChatFrame_OnUpdate = ChatFrame_OnUpdate
function ChatFrame_OnUpdate()
   if (hidden) then
      this:Hide()
   else
      ORIG_ChatFrame_OnUpdate()
   end
end