void CTestbed2Dlg::OnRButtonDown(UINT nFlags, CPoint point)
{
   ClientToScreen (&point);
   m_LastPoint = point;
   m_bMoving = TRUE;
}

// ------------------------------------------------------------------------

void CTestbed2Dlg::OnMouseMove(UINT nFlags, CPoint point)
{
   RECT cr;

   ClientToScreen (&point);

   if (m_bMoving)
   {
      if ((point.x != m_LastPoint.x) ||
          (point.y != m_LastPoint.y) )
      {
         GetWindowRect (&cr);

         int iX = cr.left - (m_LastPoint.x - point.x);
         int iY = cr.top - (m_LastPoint.y - point.y);
         int iWidth = cr.right - cr.left;
         int iHeight = cr.bottom - cr.top;

         MoveWindow (iX, iY, iWidth, iHeight);
      }
      m_LastPoint = point;
   }
   else
      CDialog::OnMouseMove(nFlags, point);
}

// ------------------------------------------------------------------------

void CTestbed2Dlg::OnRButtonUp(UINT nFlags, CPoint point)
{
   if (m_bMoving)
      m_bMoving = FALSE;
   else
      CDialog::OnMButtonUp(nFlags, point);
}