public static void HienThiKhachHang() { if (m_FrmKhachHang == null || m_FrmKhachHang.IsDisposed) { m_FrmKhachHang = new frmKhachHang(); m_FrmKhachHang.MdiParent = frmMain.ActiveForm; m_FrmKhachHang.Show(); } else { m_FrmKhachHang.Activate(); } }
private void btnKhachHang_Click(object sender, EventArgs e) { if (fKhach == null || fKhach.IsDisposed) { fKhach = new frmKhachHang(); fKhach.MdiParent = this; fKhach.Show(); } else { fKhach.Activate(); } }