Hoo, boy. I love Sonar, but it's so convoluted.
First I went to the browser, decided to try the Chord Analyzer and put it into the FX bin. It openend as any FX would.
So now I think, OK, now what do I do? OK, try what tenfoot said, right click on clip.
I get a popup menu and I follow my instincts:
Process Effect > MIDI Effects > Cakewalk FX > Chord Analyzer.
Now I have a SECOND Chord Analyzer open! And this one has OK/Cancel/Audition/Help buttons.
Well, I click Help and I get the MFX Chord Analyzer help page. It tells me to first select some notes. I try this but it does not work. Some head scratching, then I realize the second Chord Analyzer is in a Modal dialog. OK, close the duplicate Chord Analyzer and select some notes. So far, so good.
Next I read down the help and it says I must go to the Process menu and select:
Process > MIDI Effects > Cakewalk FX > Chord Analyzer to open the Velocity dialog.
I try this but only get as far as the second step because suddenly a "Apply MIDI Effects" dialog opens. So I click OK and the dialog disappears. But so does my Chord Analyzer!
And I still do not know what chord those three notes I selected are.
AAAAARGGGGHHH!