Accessing property of dynamically created controls using vb.net code behind

Hi... I'm developing training management system as a live project in asp.net using vb.net code behind. oracle 8i is my backend. i want to create dynamic check boxes related to number of records in my database table. and also want to store the content of the checked check boxes back to database. now i have done dynamic creation but not able to access its properties. can anyone help me..???Please reply fast its very urgent.. Thanks.