private void Pbthucuong_Click(object sender, EventArgs e)
 {
     using (HienThiChiTiet form = new HienThiChiTiet(dataImageToZoom))
     {
         form.ShowDialog();
     }
 }
 private void Imgboxxemtruoc_Click(object sender, EventArgs e)
 {
     if (dataImageToZoom.Length > 0 && dataImageToZoom != null)
     {
         using (HienThiChiTiet form = new HienThiChiTiet(dataImageToZoom))
         {
             form.ShowDialog();
         }
     }
 }