Several date-related udfs

1. Return date day of the current month condition: known date
FunctionMonthdays (dtalocal)
Monthdays = datediff ("D", dtalocal, dateadd ("M", 1, dtalocal ))
EndFunction
Note:This function has a bug. Please do not use it!

Use the following 2nd methods to obtain the number of days.

2. returns the day of the current month. condition: known year, month
FunctionMonthdays (inty, intm)
Monthdays = Day (dateserial (inty, intm + 1, 0 ))
EndFunction
For example, inty = 2004, intm = 2 get 29
Note: This method comes from http://dev.csdn.net/article/54/54074.shtm unverified monthdays (2004, 12)