private void btnDSLop_ItemClick(object sender, ItemClickEventArgs e) { var form = new frmLopMonHoc(); if (ExistForm(form)) { return; } form.MdiParent = this; form.Show(); }
private void btnDanhsachlophoc_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e) { var form1 = new frmLopMonHoc(); if (ExistForm(form1)) { return; } form1.MdiParent = this; form1.Show(); }