//KHI KÍCH BUTTON THÊM
        private void ThemTaiKhoan()
        {
            ChucNang = "F9";
            DangNhap_ThongTin DangNhap = new DangNhap_ThongTin();

            A.GiaoDien.QuanLyTaiKhoan QLTK = new A.GiaoDien.QuanLyTaiKhoan(ChucNang, DangNhap);
            QLTK.DuLieu = new QuanLyTaiKhoan.DuLieuTruyenVe(LayDuLieu);
            QLTK.ShowDialog(this);
            XacNhanXoa = 0;
            txtTimKiem.Focus();
        }
        //KHI KÍCH BUTTON SỬA THÔNG TIN
        private void SuaTaiKhoan()
        {
            ChucNang = "F10";
            DangNhap_ThongTin DangNhap = new DangNhap_ThongTin();

            DangNhap.TaiKhoan = tbDanhSachTaiKhoan.Rows[DongChon].Cells[0].Value.ToString();
            DangNhap.Quyen    = tbDanhSachTaiKhoan.Rows[DongChon].Cells[1].Value.ToString();
            A.GiaoDien.QuanLyTaiKhoan QLTK = new A.GiaoDien.QuanLyTaiKhoan(ChucNang, DangNhap);
            QLTK.DuLieu = new QuanLyTaiKhoan.DuLieuTruyenVe(LayDuLieu);
            QLTK.ShowDialog(this);
            XacNhanXoa = 0;
            txtTimKiem.Focus();
        }
 //KHI KÍCH BUTTON THÊM
 private void ThemTaiKhoan()
 {
     ChucNang = "F9";
     DangNhap_ThongTin DangNhap = new DangNhap_ThongTin();
     A.GiaoDien.QuanLyTaiKhoan QLTK = new A.GiaoDien.QuanLyTaiKhoan(ChucNang, DangNhap);
     QLTK.DuLieu = new QuanLyTaiKhoan.DuLieuTruyenVe(LayDuLieu);
     QLTK.ShowDialog(this);
     XacNhanXoa = 0;
     txtTimKiem.Focus();
 }
 //KHI KÍCH BUTTON SỬA THÔNG TIN
 private void SuaTaiKhoan()
 {
     ChucNang = "F10";
     DangNhap_ThongTin DangNhap = new DangNhap_ThongTin();
     DangNhap.TaiKhoan = tbDanhSachTaiKhoan.Rows[DongChon].Cells[0].Value.ToString();
     DangNhap.Quyen = tbDanhSachTaiKhoan.Rows[DongChon].Cells[1].Value.ToString();
      A.GiaoDien.QuanLyTaiKhoan QLTK = new A.GiaoDien.QuanLyTaiKhoan(ChucNang, DangNhap);
     QLTK.DuLieu = new QuanLyTaiKhoan.DuLieuTruyenVe(LayDuLieu);
     QLTK.ShowDialog(this);
     XacNhanXoa = 0;
     txtTimKiem.Focus();
 }