DN_FIRST = H_MAX - 300&amp;                  '// header
Public Const HDN_LAST = H_MAX - 399&amp;

Public Const HDN_ITEMCHANGINGA = (HDN_FIRST - 0)
Public Const HDN_ITEMCHANGINGW = (HDN_FIRST - 20)
Public Const HDN_ITEMCHANGEDA = (HDN_FIRST - 1)
Public Const HDN_ITEMCHANGEDW = (HDN_FIRST - 21)
Public Const HDN_ITEMCLICKA = (HDN_FIRST - 2)
Public Const HDN_ITEMCLICKW = (HDN_FIRST - 22)
Public Const HDN_ITEMDBLCLICKA = (HDN_FIRST - 3)
Public Const HDN_ITEMDBLCLICKW = (HDN_FIRST - 23)
Public Const HDN_DIVIDERDB