Add a Max of 2 Hours to DateTimePicker (Just Time) in Delphi 5

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Delphi

programming

Hi to all.
I need to set a max. of 2 hours after a first selection, this in Delphi 5.
This is what I mean:
I have two date-time-pickers set to show only the time, when I select a Time in the first one I need to limit the second to show or to select just 2 hours after the first (Ex. If in the first one I choose 9:00 AM, the second is just going to let me select [or select automatically] the 11:00 AM)
Thanks in advance for your answers.

UPDATE
I found the solution...it was so easy...
To anyone who cares about it:

tmrEnd.Time:=tmrEntry.Time+ EncodeTime(2,0,0,0);