private void MainPage_MouseEnter(object sender, EventArgs e)
{
if (flag == false)
{
Login l = new Login();
l.Show();
l.BringToFront();
flag = true;
}
}
private void MainPage_MouseClick(object sender, MouseEventArgs e)
{
Login l = new Login();
l.Show();
l.BringToFront();
}