Introduction        Introduction to misc functions
 BLANK()             Empty date fields
 COMPLEMENT()        Return counterpart to argument
 DATATYPE()          Detect data type
 KEYSEC()            Return value after specified time
 KEYTIME()           Perform operations at specified time
 NUL()               Convert function to null string
 SCANKEY()           Return scan keycode untranslated
 SOUND()             Produce notes and melodies
 XTOC()              Return expression with any data type