Any character, with the exception of the date or time format characters, can be used within the format string. For example, you may wish to use a slash to separate the different elements (month, day, year) of the date, as in "12/30/95", or you may wish to use a colon to separate the different elements (hours, minutes, seconds) of the time, as in "12:30:10".
If you wish to use any of the above characters in the format string, they must appear in quotes. For example:
ToText(DateTime(1995,10,12,13,20,22), "MM/dd/yy hh 'h' mm 'min' ss 'sec' ", 'am', 'pm') = "10/12/95 1 h 20 min 22 sec pm"