[gmarco]

Thanks very much sticklord !!

It works like a charm.

-- Tooltip code and hooksecurefunc by sticklord
-- Thanks !
-- ideas and discussions here:
-- [url]http://www.wowinterface.com/forums/showthread.php?p=307934[/url]
 
local ADDON = ...
 
local TOOLTIPDISABLED = 1
local prgname = "|cffffd200HideToolTip|r"
local IN_COMBAT
 
hooksecurefunc(GameTooltip, "SetAction", function(self)
    if (IN_COMBAT and TOOLTIPDISABLED == 1) then
        self:Hide()
    end
end)
 
local f = CreateFrame("Frame")
f:SetScript("OnEvent", function(self, event, ...)
    if event == "PLAYER_REGEN_DISABLED" then
        IN_COMBAT = true
    elseif event == "PLAYER_REGEN_ENABLED" then    
        IN_COMBAT = false
    end
end)
f:RegisterEvent("PLAYER_REGEN_DISABLED")
f:RegisterEvent("PLAYER_REGEN_ENABLED")
 
print (prgname .. ": |cffffd200/htt|r to have tooltips back or hide again")
 
SLASH_HTT1 = "/htt";
SlashCmdList["HTT"] = function() 
    
        if TOOLTIPDISABLED == 1 then 
            TOOLTIPDISABLED = 0
            print (prgname .. ": tooltips enabled in combat")
        else            
            TOOLTIPDISABLED = 1
            print (prgname .. ": tooltips disabled in combat")
        end
end

I have added an option to temporary reenable them if sometime you need to read tooltip again.

Here is the full code.
Thanks really very much !