how to run queries??

Hi,

I am using visual web developer2005 express edition and finding hard time to get my query run in this i am making my own login page as i have few more things to ask to user before they get logged in so i am not using the login control.

i want to write my own querywithout help ofsqlDataSource control from start something like

sqldatasource con=new sqldatasource;

con.connection String=""

then what all things will come...... ?

and please give me some poitners to some articles which help one to do the requested.

Regards,

Please checkheresql