There are already command events, but it's annoying having to type /(custom command name) etc... every time. Also, it would be pretty easy if it utilized the same system as follows:
onEventCmd >> Self/NB >> ifEventCmd [Command Root] [Event Range]
onEventCmdTrue ...
onEventCmdFalse ...
And then perhaps create some VCE variables for following parameters.
Like for instance, for a custom stereo in your house, /setmusic AfterSchoolSpecial.
Or for an RPG,
/donate 5 Gold