How to define common odbc connection??

Question

Hi 
I'm new to .net , I'm creating a new windows application, i have 3 forms in it, all the forms will have related to database execution, so every time do i need to define same set of odbc connection or there any function to create it as common and can be called by the all the forms??

OdbcConnection dbcon = new OdbcConnection("Driver={IBM DB2 ODBC DRIVER};DBALIAS=TEST;Uid=db2admin;Pwd=xingmpeg;");

        OdbcCommand cmd;

        OdbcDataAdapter oda;

        DataSet ds;

 dbcon.Open();

                        string dbcmd = "Select * from tbl_login where u_name = '" + textBox1.Text + "'";

                        cmd = new OdbcCommand(dbcmd, dbcon);

                        oda = new OdbcDataAdapter();

                        ds = new DataSet();

                        oda.SelectCommand = cmd;

                        oda.Fill(ds);

                        dbcon.Close();