Filtering in AX with Dates and Date / Times


I'm trying to write a filter for the AX2012 case screen that shows any cases that have exceeded the service level agreement.  If I was just looking at cases that are late based upon a date I could use (lessThanDate(0)) but I would like to take the filter one step further and include cases that are later than the current date / time, not just the date.

Does anyone have a clue how this might be achieved please?

Cheers Jon