private void Logowanie_Click(object sender, EventArgs e)
{
if (frmLogowanie == null)
{
frmLogowanie = new Logowanie();
frmLogowanie.FormClosed += Logowanie_FormClosed;
}
frmLogowanie.Show(this);
Hide();
}
private void Logowanie_FormClosed(object sender, FormClosedEventArgs e)
{
frmLogowanie = null;
Show();
}