Проблема с ReadDirectoryChangesW

[zhan313]

Скажите что я делаю не так ?
ReadDirectoryChangesW выскакивает по ошибке NO ACCESS

Monitor proc

   invoke lstrcpy,addr FileName,addr dir
   invoke lstrlen,addr dir
   mov      lenDir,eax
   mov      SizeDir,eax
   add      SizeDir,offset FileName
   invoke CreateFile, addr dir, FILE_LIST_DIRECTORY,\
         FILE_SHARE_READ or FILE_SHARE_WRITE or FILE_SHARE_DELETE,\
         NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL
   mov      hDir,eax
   .If hDir == INVALID_HANDLE_VALUE
      invoke MessageBox,hWnd,addr T,addr AppName,MB_OK
   .endif
RunDir:
   cmp      Run,0
   jne      EndDir
      invoke ReadDirectoryChangesW, hDir, addr Buf, sizeof Buf,TRUE,\
            FILE_NOTIFY_CHANGE_FILE_NAME, addr cb,NULL,NULL
      .If eax!=0
         mov      edx,offset Buf
Next:
         push   eax
         push   edx
         cmp      dword ptr[edx+4],FILE_ACTION_ADDED   
         jne      Other
         add      edx,12
         shr      dword ptr [edx-4],1
         mov      esi,SizeDir
         add      esi,dword ptr [edx-4]
         inc      dword ptr [edx-4]
         invoke WideCharToMultiByte,CP_ACP,0,edx,\
            dword ptr [edx-4],SizeDir,dword ptr [edx-4],NULL,NULL
         mov      byte ptr[esi],0
         invoke MessageBox, hWnd, addr FileName, addr AppName,MB_OK

Other:         
         pop      edx
         pop      eax
         mov      ebx,dword ptr[edx]
         add      edx,ebx
         cmp      ebx,0
         jnz      Next
      .else
         invoke MessageBox, hWnd, addr T1, NULL, MB_OK
      .endif
   jmp      RunDir
EndDir:
   invoke CloseHandle,hDir
   ret

Monitor endp