Missing messages in the windows.inc

[ragdog]

Hi i coding a draglistbox

now need i this messages DRAGLISTMSGSTRING for
invoke RegisterWindowMessage,DRAGLISTMSGSTRING

I cannot find this in the windows.inc

i look in the COMMCTRL.h
#define DRAGLISTMSGSTRING "commctrl_DragListMsg" ;<<<<<<<<<<<<<<<<<<<<

#define DL_BEGINDRAG  (WM_USER+133)
#define DL_DRAGGING  (WM_USER+134)
#define DL_DROPPED  (WM_USER+135)
#define DL_CANCELDRAG  (WM_USER+136)