42S (or Free42): Detect Shift key with MENU?

[Dave Britten]

I can't remember if there's a way to do this or not, but if I'm displaying an application menu via MENU and appropriate KEY commands, is there a way to change the program's behavior if one of the menu options is invoked with Shift? Maybe a flag or something that can be tested to see if Shift had been pressed?

Also, is there any way to intermingle MVAR and KEY within a single menu?