Chord name question

[Jerm]

Hi. I know alot of chords on the keyboard, but what can I do to learn the name of the chords that I am playing? For example, C Minor 9. How do I form Minor/Major 9 chords, and how do I know what name to call it? (Ex. D Major 9)

[blkerr1117]

Maybe this will help

http://www.gootar.com/piano/