private void btnThem_Click(object sender, EventArgs e)
        {
            Forms.frmTacGia frmTG = new Forms.frmTacGia();

            frmTG.myEvent += frm_myEvent;

            frmTG.ShowDialog();
        }
        private void btnChinhSua_Click(object sender, EventArgs e)
        {
            try
            {
                string _maTG = grid_TacGia.GetRowCellValue(grid_TacGia.FocusedRowHandle, grid_TacGia.Columns["MaTG"]).ToString();

                // Truyen cai MaTL vua lay dx...qua ben form NhapTheLoai.
                Forms.frmTacGia frmTG = new Forms.frmTacGia(_maTG);
                frmTG.myEvent += frm_myEvent;
                txtTim.Text = "";
                frmTG.ShowDialog();
            }
            catch
            {
                XtraMessageBox.Show("Bạn phải chọn dòng chưa dữ liệu", Text, MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }