Date and Time Functions

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Hello,

I am looking for two functions that will take a date

and time value and return a real number representation.

This functionality seems apparent in some applications

that I own.

If I pass March 12, 1999 (or 03/12/99), I would like to

get back 19990312. I would like to do the reverse, also.

If I pass the time as 20:44:18.761, I would like to get

back 0.86410602. Here, too, I would like to do the

reverse.

I would like to pass both in at the same time, possibly

as an object, and get the value back as a real number.

And vice-versa.

Does anyone have the source code for this? Does anyone

know where I can get the code for this? Maybe a library

of functions?

Thanks,

Rodney