When ever you hover your mouse over a native function, user defined function, or an AutoItObject method then you will see the calltip for that function.
Click "Like This" if you found this useful!
To use this just place the following lua file in the "...AutoIt3\SciTE\lua" directory.
MouseHoverCallTips.zip
downloads:741
After you have done that then open SciTE and click 'Options' --> 'Open Lua Startup Script' and paste this line after the other lines (may require administrative rights):
LoadLuaFile("MouseHoverCallTips.lua")
Updates and changes: