private void mascotasToolStripMenuItem_Click(object sender, EventArgs e) { if (abmMascota == null) { abmMascota = new frmMascota(); abmMascota.MdiParent = this; abmMascota.FormClosed += new FormClosedEventHandler(abmMascota_FormClosed); abmMascota.Show(); } else { abmMascota.Activate(); } }
void abmMascota_FormClosed(object sender, FormClosedEventArgs e) { abmMascota = null; }