how to open next form base on select query base on flag

Question

Hi all,

Iam creating one application my requirment is what when coloumn name Status is N in Registration table then current form should hide and Login form should be open

if Status is not N then its should be open Registration_Form im trying but its giving me error Error creating window handle.on rf.Show()

string connectionString = null;

connectionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;

con.ConnectionString = connectionString;

string Comparing="N";

string query = "select Status from Registration where Status='N'";

con.Open();

OleDbCommand cmd = new OleDbCommand(query, con);

string compare = Convert.ToString(cmd.ExecuteScalar());

con.Close();

if (compare == Comparing)

{

this.Hide();

Login_Page lp = new Login_Page();

lp.Show();

}

else if (compare != Comparing)

{

Registration_Form rf = new Registration_Form();

rf.Show();

}