MilliSecondSpan¶

Calculate the approximate number of milliseconds between two TDateTime values.

Declaration¶

Source position: dateutil.inc line 301

function MilliSecondSpan(const ANow: TDateTime; const AThen: TDateTime)
                         : Double;

Arguments¶

Name	Description
ANow	First moment in time.
AThen	Second moment in time.

Function result¶

Number (fractions included) of seconds between ANow and AThen.

Description¶

MilliSecondSpan returns the number of milliseconds between ANow and AThen. Since millisecond is the smallest fraction of a TDateTime indication, the returned number will always be an integer value.

See also¶

Name	Description
YearSpan	Calculate the approximate number of years between two TDateTime values.
MonthSpan	Calculate the approximate number of months between two TDateTime values.
WeekSpan	Calculate the approximate number of weeks between two TDateTime values.
DaySpan	Calculate the approximate number of days between two TDateTime values.
HourSpan	Calculate the approximate number of hours between two TDateTime values.
MinuteSpan	Calculate the approximate number of minutes between two TDateTime values.
SecondSpan	Calculate the approximate number of seconds between two TDateTime values.
MilliSecondsBetween	Calculate the number of whole milliseconds between two TDateTime 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.