private void quanlidia_click(object sender, EventArgs e) { bool check = CheckExistForm("frmQuanlydia"); if (!check) { frmQuanlydia quanLyDia = new frmQuanlydia(); quanLyDia.MdiParent = this; quanLyDia.Show(); } else { ActiveChildForm("frmQuanlydia"); } }
private void quanlidia_click(object sender, EventArgs e) { frmQuanlydia quanLyDia = new frmQuanlydia(); quanLyDia.Show(); }