Newsgroup: it.comp.lang.visual-basic
Titolo: aiuto





Mi servirebbe un programma che una volta 
inserita    la data di nascita di una persona mi dicesse con 
esattezza l'età in anni e mesi di quella persona.


Grazie a tutti



DateDiff Function
Returns a Variant (Long) specifying the number of time intervals
between two specified dates.
Syntax
DateDiff(interval, date1, date2[, firstdayofweek[, firstweekofyear]])
The DateDiff function syntax has these named arguments:
PartDescription
intervalRequired. String expression that is the interval of time you
use to calculate the difference between date1 and date2.
date1, date2Required; Variant (Date). Two dates you want to use in the
calculation.
firstdayofweekOptional. A constant that specifies the first day of the
week. If not specified, Sunday is assumed.
firstweekofyearOptional. A constant that specifies the first week of
the year. If not specified, the first week is assumed to be the week
in which January 1 occurs.
Settings
The interval argument has these settings:
SettingDescription
yyyyYear
qQuarter
mMonth
yDay of year
dDay
wWeekday
wwWeek
hHour
nMinute
sSecond
The firstdayofweek argument has these settings:
ConstantValueDescription
vbUseSystem0Use the NLS API setting.
vbSunday1Sunday (default)
vbMonday2Monday
vbTuesday3Tuesday
vbWednesday4Wednesday
vbThursday5Thursday
vbFriday6Friday
vbSaturday7Saturday
ConstantValueDescription
vbUseSystem0Use the NLS API setting.
vbFirstJan11Start with week in which January 1 occurs (default).
vbFirstFourDays2Start with the first week that has at least four days
in the new year.
vbFirstFullWeek3Start with first full week of the year.
Remarks
You can use the DateDiff function to determine how many specified time
intervals exist between two dates. For example, you might use DateDiff
to calculate the number of days between two dates, or the number of
weeks between today and the end of the year.
To calculate the number of days between date1 and date2, you can use
either Day of year ("y") or Day ("d"). When interval is Weekday ("w"),
DateDiff returns the number of weeks between the two dates. If date1
falls on a Monday, DateDiff counts the number of Mondays until date2.
It counts date2 but not date1. If interval is Week ("ww"), however,
the DateDiff function returns the number of calendar weeks between the
two dates. It counts the number of Sundays between date1 and date2.
DateDiff counts date2 if it falls on a Sunday; but it doesn't count
date1, even if it does fall on a Sunday.
If date1 refers to a later point in time than date2, the DateDiff
function returns a negative number.
The firstdayofweek argument affects calculations that use the "w" and
"ww" interval symbols.
If date1 or date2 is a date literal, the specified year becomes a
permanent part of that date. However, if date1 or date2 is enclosed in
double quotation marks (" "), and you omit the year, the current year
is inserted in your code each time the date1 or date2 expression is
evaluated. This makes it possible to write code that can be used in
different years.
When comparing December 31 to January 1 of the immediately succeeding
year, DateDiff for Year ("yyyy") returns 1 even though only a day has
elapsed.
Note   For date1 and date2, if the Calendar property setting is
Gregorian, the supplied date must be Gregorian.  If the calendar is
Hijri, the supplied date must be Hijri.
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--
 
federic...@planet.it
Eliminare NOSPAM dall'indirizzo! Delete NOSPAM from address!