file aspx เรียกใช้ตัวแปรจาก Code behind ASP.NET [VB]

<button type="button" class="btn btn-info btn-sm" data-toggle="modal" data-target="#myModal">Show</button>
<div class="modal fade" id="myModal" role="dialog">
    <div class="modal-dialog">
        <div class="modal-content">
             <div class="modal-header">
                 <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                 <h4 class="modal-title">Title</h4>
             </div>
             <div class="modal-body">
                  <p> จะเอาตัวแปรในหน้า Code behind มาใส่ตรงนี้ </p>
             </div>
             <div class="modal-footer">
                  <button type="button" class="btn btn-primary" data-dismiss="modal">Close</button>
             </div>
        </div>
    </div>
</div>