Autohotkey is a program that can be used to make hot keys etc. When used with command lines or MCC commands, there is one thing to remember. Autohotkey requires commas to be escaped with a grave accent (`) character. Otherwise Autohotkey will interpret it as the next parameter for a Autohotkey command.
To use the MCC_THEATER_VIEW command (23000) in Playing Now mode (in order to program a button that switches directly to Theater View's Playing Now) with the MC Command Line launcher in Autohotkey, you'd use:
run mc19.exe /mcc 22001`,2