private void skinsToolStripMenuItem_Click(object sender, EventArgs e) { if (FrmSkins.IsDisposed) { FrmSkins = new SkinsFrm(); FrmSkins.MdiParent = this; FrmSkins.Show(); } else { if (FrmSkins.Visible) { FrmSkins.WindowState = FormWindowState.Normal; FrmSkins.Focus(); } else { FrmSkins.MdiParent = this; FrmSkins.Show(); } } }