0x00000000 OFFSET
0x00000001 LBN_SELCHANGE
0x00000002 LBN_DBLCLK
0x00000003 LBN_SELCANCEL
0x00000004 LBN_SETFOCUS
0x00000005 LBN_KILLFOCUS
0xFFFFFFFE LBN_ERRSPACE
