Specify that an entire section of script should be commented out.
#comments-start
...
...
#comments-end
#comments-start
MsgBox(4096, "", "This won't be executed")
MsgBox(4096, "", "Or this")
#comments-end
;;; #cs
MsgBox(4096, "", "This will print if '#cs/#ce' are commented out.")
;;; #ce