[Fizzlemizz]

A simple button on the WorldMapFrame:

local f = CreateFrame("Button", "AeroMaxxMapButton", WorldMapFrame, "UIPanelButtonTemplate") -- Create a standard Wow style red button (UIPanelButtonTemplate) with the name AeroMaxxMapButton and parent it to the WorldMapFrame
f:SetSize(100, 25) -- Obvious
f:SetFrameStrata("HIGH") -- Set the button high enought in the strata/Level stacks to be seen
f:SetFrameLevel(511)
f:SetPoint("TOPLEFT", 100, 0) -- Position the button's TOPLEFT corner relative to the TOPLEFT of the MapFrame (parent)
f:SetText("Click Me!") -- Give it some text
f:SetScript("OnClick", function(self) -- Tell the button what to do when you click it
    print("You clicked the:", self:GetName())
end)