Looking for the code to make a form for a database search, please help.

Hi everyone, I have a database and I would like people to be able to query it. My aim is to have them fill in boxes (on a form is what Im thinking) and the values they put in the form are passed as variables to a database query to return what they want from the database (much like a search engine I guess). Can anyone help, perhaps point me to a web site that features this kind of code? Help appreciated, Doug