private void btnQLLoaiSanPham_Click(object sender, EventArgs e)
{
DanhSachKhachHang danhSachKhachHang = new DanhSachKhachHang();
this.Hide();
danhSachKhachHang.ShowDialog();
this.Show();
}
private void btnTenKH_Click(object sender, EventArgs e)
{
DanhSachKhachHang danhSachKhachHang = new DanhSachKhachHang();
this.Hide();
danhSachKhachHang.ShowDialog();
if (danhSachKhachHang.bel_kh.HoTen != null)
{
this.bel_kh = new BEL_KHACHHANG(danhSachKhachHang.bel_kh);
txtTenKH.Text = this.bel_kh.HoTen;
}
this.Show();
}