WoWInterface - Need help setting a macro icon.

I've macro'd "/click ExtraActionButton1" in order to have a macro for various world quests and quests in general. Unfortunately the macro itself doesn't get the icon or tooltip of the respective item/spell.

I want to set the macro icon dynamically depending on the current item/spell that's in the ExtraActionButton1.

What I've come up with so far is:

Code:

local frame = CreateFrame("FRAME", "SetMacroIconForEAB1");

frame:RegisterEvent("UPDATE_EXTRA_ACTIONBAR");

local function eventHandler(self, event, ...)

        for mi = 1, _G.MAX_ACCOUNT_MACROS + _G.MAX_CHARACTER_MACROS do

                local str = "EAB1"

                local name, icon, body = GetMacroInfo(mi)

                        if string.find(body,str) then

                                local button = _G['ExtraActionButton1']

                                local slot = ActionButton_GetPagedID(button) or ActionButton_CalculateAction(button) or button:GetAttribute('action') or 0

                                local actionType, id, _ = GetActionInfo(slot)

                                local actionName = GetSpellInfo(id)

                                print(aname,actionName)

                                SetMacroSpell(name,actionName)

                                break

                        end

        end

end

frame:SetScript("OnEvent", eventHandler);

That doesn't work however. I suspect that the ExtraActionButton1 isn't accessible from the above lua code. Any suggestions?

Edit: Found out that the slot for the ExtraActionButton1 is 121. Tried with manually defining slot as 121, but GetActionInfo just returns "nil".