Airport Boards Departures within time period

How can I find flights that are departing within a certain time period, lets say the next two hours, calling Aiport boards seems to return a whole slew of flights that seem out of date?

Regards,
Robert.

It is not possible to specify a time range for the airport board functions. Your application will need to make the request and ignore the entries that are not what you are looking for. The flights returned should be sorted by time.