delphi 6 新增加函数
Returns the number of whole days between two specified TDateTime values.
Unit
DateUtils
Category
date/time routines
function DaysBetween(const ANow, Athen
: TDateTime): Integer;
Description
Call DaysBetween to obtain the difference, in days, between two TDateTime values.
DaysBetween counts only whole days that have elapsed. Thus, DaysBetween reports the difference between Dec 31, 1999 11:59 PM and Jan 1, 2000 11:58 PM as 0 because the difference is one minute short of an entire day.