private void DrawDataPoints()
{
   d3dDevice.SetTexture(0, null);
   for (int i = 0; i <= dataList.Length - 1; i++)
   {
      d3dDevice.Transform.World = Matrix.Translation((float)dataList.X, (float)dataList.Y, (float)dataList.Z);

      dataSphereMesh.DrawSubset(0);
   }
}

protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
{
   mousing = true;
   string test = "";
   for (int i = 0; i <= dataList.Length - 1; i++)
   {
      dataPosition = new Vector3(dataList.X, dataList.Y, dataList.Z);
      if (testHit(e.X, e.Y, dataPosition))
         test = "it's a hit!";
      else
         test = "false";
   }
   this.Text = test;
}


private bool testHit(Single x, Single y, Vector3 position)
{
   Vector3 near = new Vector3(x, y, 0);
   Vector3 far = new Vector3(x, y, 1);
   near.Unproject(d3dDevice.Viewport, d3dDevice.Transform.Projection, d3dDevice.Transform.View, Matrix.Translation(position));

   far.Unproject(d3dDevice.Viewport, d3dDevice.Transform.Projection, d3dDevice.Transform.View, Matrix.Translation(position));

   far.Subtract(near);
   IntersectInformation closest = new IntersectInformation();
   if (dataSphereMesh.Intersect(near, far, out closest))
     return true;
   else
     return false;
}