winform login check from access database

string strcnn = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=test.mdb";
OleDbConnection cnn = new OleDbConnection(strcnn);
cnn.Open();
string reqet = "SELECT count(*) FROM login";
OleDbCommand cmd = new OleDbCommand(reqet, cnn);
int x = (int)cmd.ExecuteScalar();

if (x>0)
    MessageBox.Show("login successfully");
else
    MessageBox.Show("invalid username or pwd !");

cnn.Close();