private void товарыНаСкладеГПToolStripMenuItem_Click(object sender, EventArgs e) { if (f10 == null) { f10 = new Form10(); f10.MdiParent = this; f10.FormClosed += new FormClosedEventHandler(f10_FormClosed); f10.Show(); } else { f10.Activate(); } }
void f10_FormClosed(object sender, FormClosedEventArgs e) { f10 = null; }