I may not be understanding your description, but it sounds like you are
trying to use an Access Date/Time field to hold a duration ("24:00 hours and
more").
Date/Time data time is designed to hold "point-in-time" information. As far
as I know, there is NOT an Access data type to hold duration data.
Actually, you can use a Double to hold the information if you need to
calculate it, but you cannot display it that format without converting it to
text with a custom function. (Then it can no longer be calculated.)
--
Arvin Meyer, MCP, MVP
Microsoft Access
Free Access downloads: http://www.datastrat.com http://www.mvps.org/access