Urgent help needed

I am currently doing a program to convert the serial number which
representing the seconds elapsed between midnight 01/01/1970 and now,  
to today's day and time.   Such as you enter :822819600   it will convert
to '28/01/1996 20:00:00'

I will be glad that it will be in Visual Basic format, or C.   but others
will do.  Thanks in advance.

Patrick

PO Box 12020
A'beckett St
Melbourne Vic 3000
Australia

PH:  61-3-93870912
Fax: 61-3-93870912