[Lazarus] DateDif function needed

[Jürgen Hestermann]

Am 2013-11-09 12:12, schrieb Michael Van Canneyt:
 > The dateutils unit contains DaysBetween, MinutesBetween, HoursBetween, etc.
 > Each function exists in 2 variants: one which takes partial times, another which does complete days/hours/minutes.
 > See
 > http://www.freepascal.org/docs-html/rtl/dateutils/index-5.html
 > For the documentation.

I can't find any functions that take year/month/date as arguments.
The documentation only mentions TDateTime parameters.
(i.e. http://www.freepascal.org/docs-html/rtl/dateutils/daysbetween.html )