[Cross DJ] Preview button MIDI assignement

Hey guys,
I'm the happy owner of the U-Mix Control Pro, everything works fine, great product ... well the effects could be better but i don't use them alot anyway.
Question: Is there any freaking way to MIDI assign the preview button in DJ Cross (big play button on the left... you know what I'm talking about) ?? I really don't want to touch my computer when I mix.
Cheers
I'm the happy owner of the U-Mix Control Pro, everything works fine, great product ... well the effects could be better but i don't use them alot anyway.
Question: Is there any freaking way to MIDI assign the preview button in DJ Cross (big play button on the left... you know what I'm talking about) ?? I really don't want to touch my computer when I mix.
Cheers