void mItemAlterType_Click(object sender, EventArgs e) { if (frmAlterType == null) { frmAlterType = new JERPApp.Define.Product.FrmPrdType(); new FrmStyle(frmAlterType).SetPopFrmStyle(this); frmAlterType.AffterSelected += new JERPApp.Define.Product.FrmPrdType.AffterSelectedDelegate(frmAlterType_AffterSelected); } frmAlterType.ShowDialog(); }