一个自己封装的日期时间操作的用户对象[1]

$pbexportheader$nvo_datetime.sru
$pbexportcomments$日期时间操作类
forward
global type nvo_datetime from nonvisualobject
end type
type stc_systemtime from structure within nvo_datetime
end type
end forward

type stc_systemtime from structure
	integer		wyear
	integer		wmonth
	integer		wdayofweek
	integer		wday
	integer		whour
	integer		wminute
	integer		wsecond
	integer		wmilliseconds
end type

global type nvo_datetime from nonvisualobject autoinstantiate
end type

type prototypes
function long setsystemtime(stc_systemtime lpsystemtime) library "kernel32.dll" 
end prototypes

forward prototypes
public function integer of_getdaysinmonth (date ad_date)
public function date of_getlastdayinmonth (date ad_date)
public function date of_getlastdayinmonth (integer ai_year, integer ai_month)
public function date of_getfirstdayinmonth (date ad_date)
public function date of_getfirstdayinmonth (integer ai_year, integer ai_month)
public function boolean of_isleapyear (date ad_date)
public function boolean of_isleapyear (integer ai_year)
public function boolean of_lsweekend (date ad_date)
public function date of_skipholidays (date ad_date, integer ai_increment)
public function date of_getnextworkday (datawindow adw_holidays, string as_columnname, date ad_date)
public function date of_getpreviousworkday (datawindow adw_holidays, string as_columnname, date ad_date)
public function date of_getpreviousworkday (date ad_date)
public function date of_getnextworkday (date ad_date)
public function date of_skipholidays (datastore ads_holidays, string as_columnname, date ad_date, integer ai_increment)
public function date of_skipholidays (datawindow adw_holidays, string as_columnname, date ad_date, integer ai_increment)
public function date of_getnextworkday (datastore ads_holidays, string as_columnname, date ad_date)
public function date of_getfirstworkday (datawindow adw_holidays, string as_columnname, date ad_date)
public function date of_getfirstworkday (datastore ads_holidays, string as_columnname, date ad_date)
public function date of_getpreviousworkday (datastore ads_holidays, string as_columnname, date ad_date)
public function date of_getfirstworkday (date ad_date)
public function date of_getlastworkday (datastore ads_holidays, string as_columnname, date ad_date)
public function date of_getlastworkday (datawindow adw_holidays, string as_columnname, date ad_date)
public function date of_getlastworkday (date ad_date)
public function integer of_getdaysinmonth ()
public function integer of_countdowinmonth (date ad_date, integer ai_dow)
public function integer of_countdowinmonth (date ad_date)
public function integer of_countworkdays (datawindow adw_holidays, string as_columnname, date ad_startdate, date ad_enddate)
public function date of_getfirstdayinweek (date ad_date)
public function date of_getlastdayinweek (date ad_date)
public function date of_getfirstdayinmonth ()
public function date of_getlastdayinmonth ()
public function date of_getfirstworkday ()
public function date of_getlastworkday ()
public function date of_getfirstdayinweek ()
public function date of_getlastdayinweek ()
public function date of_getnextworkday ()
public function date of_getpreviousworkday ()
public function integer of_countholidays (datawindow adw_holidays, string as_columnname, date ad_startdate, date ad_enddate)
public function integer of_countholidays (date ad_startdate, date ad_enddate)
public function integer of_countholidays (datastore ads_holidays, string as_columnname, date ad_startdate, date ad_enddate)
public function integer of_countworkdays (datastore ads_holidays, string as_columnname, date ad_startdate, date ad_enddate)
public function integer of_countworkdays (date ad_startdate, date ad_enddate)
public function integer of_getage (date ad_brithday, date ad_date)
public function long of_yearsafter (date ad_start, date ad_end)
public function long of_monthsafter (date ad_start, date ad_end)
public function long of_weeksafter (date ad_start, date ad_end)
public function long of_secondsafter (datetime adtm_start, datetime adtm_end)
public function long of_millisecsafter (time atm_start, time atm_end)
public function date of_relativemonth (date ad_source, integer al_month)
public function datetime of_relativedatetime (datetime adtm_start, integer al_offset)
public function integer of_getquarter (date ad_source)
public function integer of_getquarter ()
public function date of_getfirstdayinquarter (date ad_date)
public function date of_getfirstdayinquarter ()
public function date of_getlastdayinquarter (date ad_date)
public function date of_getlastdayinquarter ()
public function long of_countweeksinyear (date ad_source)
public function integer of_getdayinweek (date ad_source)
public function date of_getfirstdayinyear (date ad_date)
public function date of_getfirstdayinyear ()
public function date of_getfirstdayinyear (integer ai_year)
public function date o