NM_CUSTOMDRAW with ListView

[Shrek]

Having issues getting the NM_CUSTOMDRAW message, here is a sample with the issue happening On Show, links are there for the message if anyone knows whats going on:

ListView.apz

Should be a simple matter of defining a few structure variables to then change the background and highlight colour along with text colour and font on a line by line basis once the NM_CUSTOMDRAW is confirmed.

[Shrek]

So with trial and error I got this working:

WM_NOTIFY [COLOR="#FF0000"]=[/COLOR] 0x4E
CDDS_PREPAINT [COLOR="#FF0000"]=[/COLOR] 0x00000001
CDDS_ITEM [COLOR="#FF0000"]=[/COLOR] 0x00010000
CDDS_PREPAINT [COLOR="#FF0000"]=[/COLOR] 0x00000001
CDDS_ITEMPREPAINT [COLOR="#FF0000"]=[/COLOR] CDDS_ITEM + CDDS_PREPAINT
CDRF_NOTIFYITEMDRAW [COLOR="#FF0000"]=[/COLOR] 0x00000020
CDRF_NOTIFYSUBITEMDRAW [COLOR="#FF0000"]=[/COLOR] 0x00000020
CDRF_SKIPDEFAULT [COLOR="#FF0000"]=[/COLOR] 0x00000004
CDRF_DODEFAULT [COLOR="#FF0000"]=[/COLOR] 0x00000000
CDDS_SUBITEM [COLOR="#FF0000"]=[/COLOR] 0x00020000
CDRF_NEWFONT [COLOR="#FF0000"]=[/COLOR] 0x00000002

Subclass[COLOR="#FF0000"].[/COLOR]Create(Application[COLOR="#FF0000"].[/COLOR]GetWndHandle()[COLOR="#FF0000"],[/COLOR] [COLOR="#0000FF"]function[/COLOR](hWnd[COLOR="#FF0000"],[/COLOR] uMsg[COLOR="#FF0000"],[/COLOR] wParam[COLOR="#FF0000"],[/COLOR] lParam)

 [COLOR="#0000FF"]if[/COLOR] (uMsg [COLOR="#FF0000"]==[/COLOR] WM_NOTIFY) [COLOR="#0000FF"]then[/COLOR]
  [COLOR="#0000FF"]local[/COLOR] nmhdr [COLOR="#FF0000"]=[/COLOR] MemoryEx[COLOR="#FF0000"].[/COLOR]AssignStruct(lParam[COLOR="#FF0000"],[/COLOR] NMHDR)
   [COLOR="#0000FF"]if[/COLOR] (nmhdr[COLOR="#FF0000"].[/COLOR]hWndFrom [COLOR="#FF0000"]==[/COLOR] LVHDL) [COLOR="#0000FF"]then[/COLOR]
    [COLOR="#0000FF"]if[/COLOR] (nmhdr[COLOR="#FF0000"].[/COLOR]code [COLOR="#FF0000"]==[/COLOR] [COLOR="#000000"]4294967284[/COLOR]) [COLOR="#0000FF"]then[/COLOR]
     [COLOR="#0000FF"]local[/COLOR] nmlv [COLOR="#FF0000"]=[/COLOR] MemoryEx[COLOR="#FF0000"].[/COLOR]AssignStruct(lParam[COLOR="#FF0000"],[/COLOR] NMLVCUSTOMDRAW)
     [COLOR="#0000FF"]if[/COLOR] (nmlv[COLOR="#FF0000"].[/COLOR]nmcd[COLOR="#FF0000"].[/COLOR]dwDrawStage [COLOR="#FF0000"]==[/COLOR] CDDS_PREPAINT) [COLOR="#0000FF"]then[/COLOR]
      [COLOR="#0000FF"]return[/COLOR] CDRF_NOTIFYITEMDRAW
     [COLOR="#0000FF"]end[/COLOR]
     [COLOR="#0000FF"]if[/COLOR] (nmlv[COLOR="#FF0000"].[/COLOR]nmcd[COLOR="#FF0000"].[/COLOR]dwDrawStage [COLOR="#FF0000"]==[/COLOR] CDDS_ITEMPREPAINT) [COLOR="#0000FF"]then[/COLOR]
      [COLOR="#0000FF"]return[/COLOR] CDRF_NOTIFYSUBITEMDRAW
     [COLOR="#0000FF"]end[/COLOR]
     [COLOR="#0000FF"]if[/COLOR] (nmlv[COLOR="#FF0000"].[/COLOR]nmcd[COLOR="#FF0000"].[/COLOR]dwDrawStage [COLOR="#FF0000"]==[/COLOR] CDDS_SUBITEM + CDDS_ITEMPREPAINT) [COLOR="#0000FF"]then[/COLOR]
      [COLOR="#008000"]--nmlv.nmcd.dwItemSpec is the row[/COLOR]
      [COLOR="#008000"]--nmlv.iSubItem is the column[/COLOR]
      [COLOR="#008000"]--return CDRF_NEWFONT return if changed any given colours or fonts[/COLOR]
      [COLOR="#0000FF"]return[/COLOR] CDRF_DODEFAULT
     [COLOR="#0000FF"]end[/COLOR]
    [COLOR="#0000FF"]end[/COLOR]
  [COLOR="#0000FF"]end[/COLOR]
 [COLOR="#0000FF"]end[/COLOR]
 [COLOR="#0000FF"]return[/COLOR] Subclass[COLOR="#FF0000"].[/COLOR]OldWinProc(hWnd[COLOR="#FF0000"],[/COLOR] uMsg[COLOR="#FF0000"],[/COLOR] wParam[COLOR="#FF0000"],[/COLOR] lParam);
[COLOR="#0000FF"]end[/COLOR])

[COLOR="#008000"]--LVHDL is ListView handle[/COLOR]

The NM_CUSTOMDRAW message sent via WM_NOTIFY is 4294967284 that is 0xFFFFFFF4 in hexidecimal and that bears no relation to what should be:

NM_FIRST = 0           
NM_CUSTOMDRAW = NM_FIRST -12

so the question now is whats going on? Typical messages work OK as the standard defined constraints always work but I've noticed that everything coming through a WM_NOTIFY except the WM_NOTIFY itself is always a long decimal number that makes no sense at all such as NM_CLICK should be:

NM_FIRST = 0           
NM_CLICK = NM_FIRST -2

but is coming through as 4294967294 that is FFFFFFFE so how do we easily get the correct, as in published, constraints through the Code value of the NMHDR structure?