Days in the month
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 Syntax

            GT_MDAYS( dValue ) -> nDaysInMonth
  
 Arguments:

                <dValue>   is a valid Clipper date

 Returns:

                A numeric value of the number of days in the month of the
                parameter date

 Description:

                GT_MDAYS() can be used to get the  number of days in the month for
                                   a given date

 Examples:


          ? "Days in this month ", GT_MDAYS( DATE() )

          result : Days in this month   31


 Source: GT_MDAYS.PRG

 Author:  George Brennan