# procs i want to be global, all others in my own namespace
procs command_newcommand otherproc

# add a new variable, if it doesnt exist (from saved prefs) set it to default
AddToPrefs mynewvar string "default"

proc command_newcommand {window line} {
    Echo $window "you typed $line"
}

proc mylocalproc { } {
# this proc wasnt declared in "procs" line so its in a local namespace
}

proc otherproc { } {
# this is global
}

proc unload { } {
# this local proc marks the script as unloadable
# if theres any additional cleanup to be done
# it goes here (destroy widgets, etc)
    RemoveFromPrefs mynewvar
}