DAYSACCRUAL

Returns the number of accrual days between two dates with a given basis.
basis - the tenor to use when converting the tenor to a date
ACT/ACT ACT/360 day/year

excel function - DAYS
excel function - DAYS360

Public Function DAYSACCRUAL( _ 
         ByVal Date1 As ?, _ 
         ByVal Date2 As ?, _ 
         ByVal Basis As ?) As Integer 

End Function