Power Builder - disculpen a este ignorante....

cual es la funcion con la que puedo trabajar fechar....quiero comparar si es mayor, menor, restarlas... etc.

Day The day (an integer between 1 and 31)
DayName The name of the day of the week
DayNumber A number representing the day of the week (for example, Sunday is 1 and Wednesday is 4)
DaysAfter The number of days one date occurs after another
Hour The time from which you want to obtain the hour
Minute The time from which you want to obtain the minutes
Month The month (an integer between 1 and 12)
Now Compare a time to the system time or display the system time on the screen
RelativeDate The date that occurs n days after a given date
RelativeTime The time that occurs n seconds after a given time.
Second The number of seconds in the seconds portion of a given time.
SecondsAfter The number of seconds one time occurs after another.
Today The current system date
Year The year (an integer between 1000 and 3000)

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espero te sirvan