Standard tuning: EADGBE Played mostly in C Aeolian mode of the D# Major diatonic scale. There are a few licks in C Minor pentatonic. It proves to be a nice mix of the two scales. The song pretty much stays in one area of the fretboard, so there's not alot of moving around, but it sounds like it's all over the place. Carlos Santana is a GENIUS! IMHO. Sorry it took so long. I have been working on this song for awhile (approx. a month) and it is 100% solo, so it wasn't easy for me.
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https://www.youtube.com/watch?v=jQjjeEH1SV8