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In this particular mousehook i've hooked WM_LBUTTONDOWN and got it to post the coordinates of the clicks to my program.

However, the coordinates are only saved when a click occurs in my window, although i've set a system-wide hook. Im puzzled. Thanks.

Posted on 2007-01-29 22:21:10 by Ksbunker

Re: Mousehook not system-wide!

First guess is that the hook is not inside a DLL.

Any more information..?

Posted on 2007-01-30 04:20:01 by ti_mo_n

Re: Mousehook not system-wide!

Ok, I apologise for the delay, work has been hectic. The problem as previously stated is that ive set a global hook however only left button clicks that occur from within my dialog are recorded. Im uncertain why this is the case.

dl;

.486
.model flat,stdcall
option casemap:none

include windows.inc
include kernel32.inc
include user32.inc

includelib kernel32.lib
includelib user32.lib

MouseProc		PROTO :DWORD, :DWORD, :DWORD
InstallHook 	PROTO :DWORD

.data?
	hInstance	dd ?	;Dll's module handle
	hHook		dd ?	;Hook handle
	hWnd dd ?

.const

WM_MOUSEHOOK equ WM_USER+6

.code

DllEntry proc hInst:HINSTANCE, reason:DWORD, reserved1:DWORD
	mov eax,hInst
	mov hInstance,eax

	.IF reason== DLL_THREAD_DETACH ||  reason== DLL_PROCESS_DETACH
		.IF hHook
			invoke UnhookWindowsHookEx,hHook
		.ENDIF
	.ENDIF

	mov eax,TRUE
	ret
DllEntry Endp

InstallHook proc hwnd:DWORD

	push hwnd
	pop hWnd
	
	invoke SetWindowsHookEx, WH_MOUSE, OFFSET MouseProc, hInstance, 0

	mov hHook,eax
	ret

InstallHook endp

MouseProc proc nCode:DWORD,wParam:DWORD,lParam:DWORD

	invoke CallNextHookEx,hHook,nCode,wParam,lParam
	mov edx,lParam
	assume edx:PTR MOUSEHOOKSTRUCT
	
	mov ebx, wParam
	.IF ebx == WM_LBUTTONDOWN
		
		Invoke PostMessage, hWnd, WM_MOUSEHOOK, .pt.x, .pt.y
		
	.ENDIF
	
	assume edx:nothing
	xor eax,eax
	ret
	
MouseProc endp

End DllEntry

exe;

.386
.model	flat,stdcall
option	casemap:none

include		windows.inc
include		user32.inc
include		kernel32.inc
include		shell32.inc

includelib	user32.lib
includelib	kernel32.lib
includelib	shell32.lib

WndProc		PROTO	:HWND, :DWORD, :DWORD, :DWORD

;---------------------
;
.data

DllName				db 'DLL.dll',0
szInstallHook		db 'InstallHook',0
szFormat 			db "(%d, %d)", 0



;---------------------
;
.data?

hInstance	HINSTANCE	?
pInstallHook dd ?
hHookDll dd ?
hHook dd ?
hList dd ?

;---------------------
;
.const

IDD_DIALOG = 1000
IDC_EXIT = 1001
IDC_LISTBOX = 1002
WM_MOUSEHOOK equ WM_USER+6

;---------------------
;
.code

start:

	invoke GetModuleHandle, NULL
	mov    hInstance,eax
	
	invoke DialogBoxParam, hInstance, IDD_DIALOG, NULL, OFFSET WndProc, NULL
	invoke ExitProcess, eax

WndProc	proc uses ebx hWnd:HWND, uMsg:UINT, wParam:WPARAM, lParam:LPARAM
LOCAL szBuffer[128]:byte
		
	.if uMsg == WM_INITDIALOG
	
		INVOKE SetWindowPos, hWnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOACTIVATE Or SWP_NOSIZE Or SWP_NOMOVE 
		
		Invoke GetDlgItem, hWnd, IDC_LISTBOX
		mov hList, eax
		
		invoke LoadLibrary,OFFSET DllName
		mov hHookDll, eax
		invoke GetProcAddress,hHookDll,OFFSET szInstallHook
		mov pInstallHook,eax
		
		push hWnd
		call pInstallHook
		mov hHook,eax
			
	.elseif uMsg == WM_MOUSEHOOK
		
		mov eax, wParam
		mov ebx, lParam
		Invoke wsprintf, ADDR szBuffer, ADDR szFormat, eax, ebx	
			
		invoke SendMessage, hList, LB_ADDSTRING,0, ADDR szBuffer
		Invoke SendMessage, hList, WM_VSCROLL, SB_BOTTOM, 0
		
	.elseif	uMsg == WM_COMMAND
	
		.if wParam == IDC_EXIT
			JMP thedoor
		.endif
		
	.elseif	uMsg == WM_CLOSE
		
		thedoor:
		
		invoke FreeLibrary,hHookDll
		invoke ExitProcess, 0	
		
	.endif
	
	xor	eax,eax
	ret
	
WndProc	endp


end start

rc;

;This Resource Script was generated by WinAsm Studio.

#define IDC_EXIT 1001
#define IDD_DIALOG 1000
#define IDC_LISTBOX 1002

IDD_DIALOG DIALOGEX 10,10,137,101
CAPTION "WH_MOUSE Example"
FONT 0,""
STYLE 0x10ca0880
EXSTYLE 0x00000000
BEGIN
	CONTROL "EXIT",IDC_EXIT,"Button",0x50010000,2,82,134,18,0x00000000
	CONTROL "",IDC_LISTBOX,"ListBox",0x50010140,3,2,133,78,0x00000200
END

Posted on 2007-01-31 21:47:47 by Ksbunker

Re: Mousehook not system-wide!

Going by the example code in the SDK, you should
- use LoadLibrary to load your DLL
- use GetProcAddress to get the address of the mouse hook proc
- pass that address to SetWindowsHookEx along with the DLL hmod
and do all that from your EXE, not the DLL.

Posted on 2007-01-31 22:12:54 by sinsi

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