private void btWyjazdy_Click(object sender, EventArgs e) { if (girdFormWyjazdy == null) { girdFormWyjazdy = new FormTrasy(); girdFormWyjazdy.MdiParent = this; girdFormWyjazdy.FormClosed += girdFormPojazdy_FormClosed; girdFormWyjazdy.Show(); } else { girdFormWyjazdy.Activate(); } }
private void girdFormWyjazdy_FormClosed(object sender, FormClosedEventArgs e) { girdFormWyjazdy = null; }