compare fails?

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coconut

Joined: 02 Apr 2004
Posts: 326
Location: US

coconut 30 Mar 2005, 23:35

based on my file here http://board.flatassembler.net/topic.php?t=1670 im trying to determine when a user presses VK_F5 through my hook. simply changing the lines:

Code:

       mov      eax, [lp] ;KBDLLHOOKSTRUCT
       cmp      dword [eax+4],VK_RIGHTWINKEY ;kbdllhookstruct.vkCode
       je       disable

to:

Code:

       mov      eax, [lp] ;KBDLLHOOKSTRUCT
       cmp      dword [eax+4],VK_F5 ;kbdllhookstruct.vkCode
       je       disable

fails. for that matter all VK_ keycodes i tested failed also, i could only get VK_RWIN AND VK_LWIN to work. am i missing something here? attached is the same file as the link

Description:		Download
Filename:	hook.asm
Filesize:	2.96 KB
Downloaded:	283 Time(s)

30 Mar 2005, 23:35

mike.dld

Joined: 03 Oct 2003
Posts: 235
Location: Belarus, Minsk

mike.dld 31 Mar 2005, 00:09

Code:

invoke  SetWindowsHookEx,WH_KEYBOARD,hookproc,[hinst],0
...
proc hookproc, ncode,wp,lp
       push     ebx esi edi
       mov      eax,[ncode]
       cmp      ax,HC_ACTION
       jne      skip
       bt       [lp],31
       jc       skip
  which_key:
       mov      eax, [wp]
       cmp      al,VK_F5
       je       disable
       cmp      al,VK_SPACE
       jne      skip
  disable:
       invoke   MessageBox,0,title,title,0
       or       eax,-1
       jmp      finish_up
  skip:
       mov      eax,0
       cmp      word[ncode],0
       jge      finish_up
       invoke   CallNextHookEx,[hook],[ncode],[wp],[lp]
  finish_up:
       pop      edi esi ebx
       return
endp

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31 Mar 2005, 00:09

coconut

Joined: 02 Apr 2004
Posts: 326
Location: US

coconut 31 Mar 2005, 00:33

does it work for you mike, doesnt for me. and why would it have previously worked with _RWIN and _LWIN anyways?

31 Mar 2005, 00:33

coconut

Joined: 02 Apr 2004
Posts: 326
Location: US

coconut 31 Mar 2005, 00:35

ok, WH_KEYBOARD_LL doesnt work, WH_KEYBOARD does. why is this?

31 Mar 2005, 00:35

mike.dld

Joined: 03 Oct 2003
Posts: 235
Location: Belarus, Minsk

mike.dld 31 Mar 2005, 01:05

In case of WH_KEYBOARD_LL you need a VIRTUAL key-code, not a SCAN-code, so you need to use [eax] instead of [eax+4]

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31 Mar 2005, 01:05

coconut

Joined: 02 Apr 2004
Posts: 326
Location: US

coconut 31 Mar 2005, 01:15

interesting coincidence then my old example worked with _RWIN and _LWIN, virtual keycode must be +4 of scan code for them

31 Mar 2005, 01:15

mike.dld

Joined: 03 Oct 2003
Posts: 235
Location: Belarus, Minsk

mike.dld 31 Mar 2005, 01:23

VK_LWIN & VK_RWIN are working fine for me with [eax].

_________________
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31 Mar 2005, 01:23

coconut

Joined: 02 Apr 2004
Posts: 326
Location: US

coconut 31 Mar 2005, 01:46

works like a charm now, thanks mike Smile

31 Mar 2005, 01:46

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