SP Date Functions

 DATECALC()     Adds/subtracts days,weeks,months,years to a date
 DTOW()         Converts date to words
 STOD()         Returns date from string in the form YYYYMMDD
 WOYEAR()       Calculates week of the year (# of 7 day periods)
 DTDIFF()       Returns difference between dates
 DAYSIN()       Calculates number of days in a month
 BOYEAR()       Determine beginning of year a date falls in
 BOM()          Calculates beginning of the month date
 DOYEAR()       Calculates day of the year from date
 SETCENT()      Determines if century is on/off
 WOMONTH()      Calculates week of the month (# of 7 day periods)
 BEGEND()       Determines beginning or end of week,month or quarter
 SET_DATE()     Sets and restores date format

SP_DAYSIN

DAYSIN()

  Short:
  ------
  DAYSIN() Calculates number of days in a month

  Returns:
  --------
  <nDays> => days in month of target date

  Syntax:
  -------
  DAYSIN(dTarget)

  Description:
  ------------
  Returns # of days in month in which <dTarget> falls

  Examples:
  ---------
   dDate    := ctod("10/15/89")

   nDimonth := DAYSIN(dDate)  // (returns 31)

  Source:
  -------
  S_DAYSIN.PRG