Each message which is sent to a window procedure has two data items which
serve as arguments to that message. The two items are a word-long item,
wParam, and  double-word-long item, lParam. The lParam argument is
ocassionally subdivided into two word-long parameters. These word can be
extracted using the LOWORD(lParam) and the HIWORD(lParam) macros.

 LB_ADDSTRING
 LB_DELETESTRING
 LB_DIR
 LB_FINDSTRING
 LB_GETCOUNT
 LB_GETCURSEL
 LB_GETSEL
 LB_GETSELCOUNT
 LB_GETSELITEMS
 LB_GETTEXT
 LB_GETTEXTLEN
 LB_GETTOPINDEX
 LB_INSERTSTRING
 LB_RESETCONTENT
 LB_SELECTSTRING
 LB_SETCOLUMNWIDTH
 LB_SETCURSEL
 LB_SETSEL
 LB_SETTOPINDEX