Al menos en Delphi7 existe la función MinutesBetween, que devuelve la diferencia en minutos entre dos variables tipo TDateTime.
Cita:
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Empezado por Ayuda de Delphi
MinutesBetween
Returns the number of minutes between two specified TDateTime values.
Unit
DateUtils
Category
date/time routines
Description
Call MinutesBetween to obtain the difference, in minutes, between two TDateTime values. MinutesBetween counts only entire minutes. Thus, MinutesBetween reports the difference between 9:00:00 AM and 9:00:59:999 AM as 0 because the difference is one millisecond short of an entire minute.
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Un saludo
11-11-2005
Modo Hilado