automatically insert sytem date and time to a query parameter

[sadiadad]

hello,
I am developing a database in Access 2003,
some of my queries need current date and time for their processing. now i want my query to automatically take the system date and time and use it as a parameter to the reports i create from that query. Secondly, for each quarter i.e: 4 quarters of an year,it should display the related months of that quarter in the combo box on the form.
please help me out solve these two problems
thanx in advance

[code green]

NOW() returns system datetime
Date() returns system date.
Time() returns the system time

it should display the related months of that quarter

What should?
Surely this doesn't change Jan-Mar, Apr-Jun so use string constants