private void helpToolStripMenuItem_Click(object sender, EventArgs e) { if (fhelp == null || fhelp.IsDisposed) { fhelp = new frmHelp(); fhelp.MdiParent = this; fhelp.WindowState = FormWindowState.Maximized; fhelp.StartPosition = FormStartPosition.CenterScreen; fhelp.Show(); } else { fhelp.Activate(); } }