private void tsmipdMaterial_Click(object sender, EventArgs e) { FrmPDMaterial frm = FrmPDMaterial.GetSingleton(); frm.MdiParent = this; frm.Show(); frm.Activate(); }
public static FrmPDMaterial GetSingleton() { if (frm == null || frm.IsDisposed) { frm = new FrmPDMaterial(); } return(frm); }