C#

class SubClasser : System.Windows.Forms.NativeWindow
{	

    public SubClasser(IntPtr formhandle)
    {
            base.AssignHandle(formhandle);
    }

    protected override void WndProc(
           ref System.Windows.Forms.Message m)
    {
        base.WndProc(ref m);

        switch(m.Msg)
        {
            case WM_HSCROLL:
                //do something here
                break;
            case WM_VSCROLL:
                //do something here
                break;
        }
    }

}

foreach(DataColumn in dr.Table.Columns)