You may also want to review DateSerial, DateAdd , DateValue functions.
See Date Functions at http://www.techonthenet.com/access/functions/index.php
This code
Code:
If Forms![OrderDetails]![OrderDate]![Filter] = "Today" Then
OrderDate = (Year([OrderDate]) = Year(Date) And Month([OrderDate]) = Month(Date) And Day([OrderDate]) = Day(Date))
End If
Could be
Code:
If Forms![OrderDetails]![OrderDate]![Filter] = "Today" Then
OrderDate = Date
End If
As I said, you'll have to get the values for NextMonth etc into a Date datatype or some construct that can be used with Dates.
Good luck with your project