[Overview][Constants][Procedures and functions] Reference for unit 'dateutils' (#rtl)

MilliSecondSpan

Calculate the approximate number of milliseconds between two DateTime values.

Declaration

Source position: dateutil.inc line 275

function MilliSecondSpan(

  const ANow: TDateTime;

  const AThen: TDateTime

):Double;

Arguments

ANow

  

First moment in time

AThen

  

Second moment in time

Function result

Number (fractions included) of seconds between ANowand AThen

Description

MilliSecondSpanreturns the number of milliseconds between ANowand AThen. Since millisecond is the smallest fraction of a TDateTimeindication, the returned number will always be an integer value.

See also

YearSpan

  

Calculate the approximate number of years between two DateTime values.

MonthSpan

  

Calculate the approximate number of months between two DateTime values.

WeekSpan

  

Calculate the approximate number of weeks between two DateTime values.

DaySpan

  

Calculate the approximate number of days between two DateTime values.

HourSpan

  

Calculate the approximate number of hours between two DateTime values.

MinuteSpan

  

Calculate the approximate number of minutes between two DateTime values.

SecondSpan

  

Calculate the approximate number of seconds between two DateTime values.

MilliSecondsBetween

  

Calculate the number of whole milliseconds between two DateTime values.

Example

Program Example70;

{ This program demonstrates the MilliSecondSpan function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime);

begin
 Write('Number of milliseconds between ');
 Write(TimeToStr(AThen),' and ',TimeToStr(ANow));
 Writeln(' : ',MilliSecondSpan(ANow,AThen));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Now;
  D2:=D1-(0.9*OneMilliSecond);
  Test(D1,D2);
  D2:=D1-(1.0*OneMilliSecond);
  Test(D1,D2);
  D2:=D1-(1.1*OneMilliSecond);
  Test(D1,D2);
  D2:=D1-(2.5*OneMilliSecond);
  Test(D1,D2);
End.