static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
frmLogin login = new frmLogin();
if (login.ShowDialog() == DialogResult.OK)
{
Application.Run(new frmMain());
}
}
private void btnCancle_Click(object sender, EventArgs e)
{
Form form = new frmLogin();
form.Show();
this.Close();
}