How do I assign the pitch bend wheel in Massive to any parameter control, like a macro? Is this even possible?
Can you assign a parameter in NI's Massive to the MIDI Pitch bend wheel?
No, I don't think you can, Pitch Bend and Aftertouch have dedicated controllers(They aren't in the standard MIDI CC# 1-127 which Massive sees) - Meaning they won't show up in the list of CC#s in Massive.
You may be able to do it with MIDI monitoring/editing software.
I use Ableton - Live and I can automatize the pitchbend parameter of Massive.
Go to Massive's osc tab (where is the glide and the vibrato), there is a pitchbend section where you can adjust the Up and Down range expressed in semitones. I usually use Up 12 and Down 12. Then in Live you create a midi clip, at the left of the keyboard there is a CLIP section, below it there is a "E" button for opening the enveloppes. There you can automatize things like volume, balance and pitchbend.