SQL Query to get records based on Month in SQL Server

Hi

In a table i am having following records as follows

ID       EmployeeNumber               DateOfJoin

1         Ashok                              08-23-2012 00:00:00

2         Kishore                            03-03-2012 00:00:00

Datatype of DateOfJoin is datetime.

I having a drop down list box.

In that i used to display only the month as "January, ...etc".

when i choose the month, it should select the records with only that month who are joined.

Hope that is clear.

Please let me know if this is not clear.