Help pulling data in current month only

I could use some help. I've been developing flat sites for some time now and am venturing into databases. I'm getting stuck trying to pull results out of a database where I only want the current months events to display.

Please help :)

Here is my current query
sql = "select * from tEvents ORDER BY (Start_Date) DESC"

It works beautifully however it displays all records in the database. I've tried several WHERE statements and just can't form the string correctly.

Thank You,