How can store checked box values in database?

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SQL-Server-2005

.NET

SQL-Server

Hi,
I am creating a form in .net windows application.And I have a table with the columns named as Name,Amount and Status.And In my front end, i have use two text boxes for Name and Amount columns respectively.And two checked boxes named as paid and not paid.

private void button3_Click(object sender, EventArgs e)
{
   con.Open();
   SqlCommand cmd = new SqlCommand("insert into tablename (name,id) values('"+txtName.Text+"','"+txtId.Text+"')",con);
           cmd.ExecuteNonQuery();
           con.Close();
   }

By this code, i can save Name and ID in that corresponding columns.But in Status column, i should store either one value of checked box(either paid or not paid). For this kindly send me coding.

Thanks
Viswanathan.M