HOOK

← →
YUS (2001-11-11 20:59) [0]

Доброго всем вечера. Написал хук для мыши, но он не работает.
Подскажите в чем ошибка?

DLL:
library Hook;
uses
SysUtils,windows,messages,Classes;
const WM_LMouse=WM_USER+512;
WM_RMouse=WM_USER+513;
WM_ONhook=WM_USER+514;
var
boolSetHook: Boolean;
HookHandle: hHook;
ExeHandle: THandle;

function ClickMouse(Code: Integer; wParam, lParam:Longint):Longint; stdcall;
var
msg: PEVENTMSG;
x,y:integer;
begin
msg := Pointer(LParam);
x:=msg.ParamL ;y:=msg.ParamH ;
if Code= WM_MOUSEMOVE then
//Передаю сообщение в свою форму
PostMessage(findwindow(nil,"Form1"),WM_rMouse, x, y);
Result:=CallNextHookEx(HookHandle,code,wParam,LParam);
end;

function SetHook: boolean; export;
begin
if HookHandle<>0 then UnhookWindowsHookEx(HookHandle);
//Установить хук
HookHandle := SetWindowsHookEx(WH_MOUSE, @ClickMouse, hInstance, 0);
//О результатах установки сообщить
if HookHandle=0 then PostMessage(findwindow(nil,"Form1") ,WM_ONHook, 0,0)else
PostMessage(findwindow(nil,"Form1") ,WM_ONHook, 1,0)
end;

function RHook: boolean; export;
begin
Result:=UnhookWindowsHookEx(HookHandle);
end;
exports SetHook,
RHook;
begin
end.

Это Прогр.

unit Unit1;

interface

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls;
const
WM_LMouse = wm_user +512;
WM_RMouse= wm_User +513 ;
WM_ONhook=wm_user+514;
DLLName = "Project2.dll";
type
TForm1 = class(TForm)
Label1: TLabel;
Button2: TButton;
Label2: TLabel;
procedure Button2Click(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);

private
procedure WrMouse (Var M : TMessage); message WM_RMouse;
procedure WlMouse (Var k : TMessage); message WM_LMouse;
procedure onhook (Var h : TMessage); message WM_ONhook;
{ Private declarations }
public
{ Public declarations }
end;
function SetHook: boolean; external DLLName name "SetHook";
function RHook: boolean; external DLLName name "RHook";
var
Form1: TForm1;

implementation

{$R *.DFM}
procedure TForm1.WrMouse(var M: TMessage);
begin
label1.Caption:=inttostr(m.WParam)+" / "+ inttostr(m.lParam);
end;
procedure TForm1.WlMouse(var k: TMessage);
begin
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
sethook;
end;
procedure TForm1.onhook (Var h: TMessage);
begin
if h.WParam = 0 then showmessage("Хук не установлен");
if h.WParam = 1 then showmessage("Хук установлен");
end;
procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
Rhook;
end;
end.

← →
Юрий Зотов (2001-11-13 18:12) [1]

Навскидку нашел две ошибки, больше смотреть не стал (нет смысла, этих двух более чем достаточно, чтобы программа не работала).

1. Не учтено разделение адресных пространств процессов. Сделайте поиск по сайту строки CreateFileMapping - найдете пример нормального хука.

2. См. в справке описание параметров для WH_MOUSE (MOUSEHOOKSTRUCT).

← →
Oleg Gashev (2001-11-13 22:20) [2]

Monitoring System Events

The following example uses a variety of thread-specific hook procedures to monitor the system for events affecting a thread. It demonstrates how to process events for the following types of hook procedures:

WH_CALLWNDPROC
WH_CBT
WH_DEBUG
WH_GETMESSAGE
WH_KEYBOARD
WH_MOUSE
WH_MSGFILTER
The user can install and remove a hook procedure by using the menu. When a hook procedure is installed and an event that is monitored by the procedure occurs, the procedure writes information about the event to the client area of the application"s main window.

#define NUMHOOKS 7

// Global variables

typedef struct _MYHOOKDATA
{
int nType;
HOOKPROC hkprc;
HHOOK hhook;
} MYHOOKDATA;

MYHOOKDATA myhookdata[NUMHOOKS];

LRESULT WINAPI MainWndProc(HWND hwndMain, UINT uMsg, WPARAM wParam,
LPARAM lParam)
{
static BOOL afHooks[NUMHOOKS];
int index;
static HMENU hmenu;

switch (uMsg)
{
case WM_CREATE:

// Save the menu handle.

hmenu = GetMenu(hwndMain);

// Initialize structures with hook data. The menu-item
// identifiers are defined as 0 through 6 in the
// header file. They can be used to identify array
// elements both here and during the WM_COMMAND
// message.

myhookdata[IDM_CALLWNDPROC].nType = WH_CALLWNDPROC;
myhookdata[IDM_CALLWNDPROC].hkprc = CallWndProc;
myhookdata[IDM_CBT].nType = WH_CBT;
myhookdata[IDM_CBT].hkprc = CBTProc;

myhookdata[IDM_DEBUG].nType = WH_DEBUG;
myhookdata[IDM_DEBUG].hkprc = DebugProc;
myhookdata[IDM_GETMESSAGE].nType = WH_GETMESSAGE;
myhookdata[IDM_GETMESSAGE].hkprc = GetMsgProc;
myhookdata[IDM_KEYBOARD].nType = WH_KEYBOARD;
myhookdata[IDM_KEYBOARD].hkprc = KeyboardProc;
myhookdata[IDM_MOUSE].nType = WH_MOUSE;
myhookdata[IDM_MOUSE].hkprc = MouseProc;
myhookdata[IDM_MSGFILTER].nType = WH_MSGFILTER;

myhookdata[IDM_MSGFILTER].hkprc = MessageProc;

// Initialize all flags in the array to FALSE.

memset(afHooks, FALSE, sizeof(afHooks));

return 0;

case WM_COMMAND:
switch (LOWORD(wParam))
{
// The user selected a hook command from the menu.

case IDM_CALLWNDPROC:
case IDM_CBT:
case IDM_DEBUG:
case IDM_GETMESSAGE:

case IDM_KEYBOARD:
case IDM_MOUSE:
case IDM_MSGFILTER:

// Use the menu-item identifier as an index
// into the array of structures with hook data.

index = LOWORD(wParam);

// If the selected type of hook procedure isn"t
// installed yet, install it and check the
// associated menu item.

if (!afHooks[index])
{
myhookdata[index].hhook = SetWindowsHookEx(
myhookdata[index].nType,
myhookdata[index].hkprc,
(HINSTANCE) NULL, GetCurrentThreadId());
CheckMenuItem(hmenu, index,
MF_BYCOMMAND | MF_CHECKED);
afHooks[index] = TRUE;

}

// If the selected type of hook procedure is
// already installed, remove it and remove the
// check mark from the associated menu item.

else
{
UnhookWindowsHookEx(myhookdata[index].hhook);
CheckMenuItem(hmenu, index,
MF_BYCOMMAND | MF_UNCHECKED);
afHooks[index] = FALSE;

}

default:
return (DefWindowProc(hwndMain, uMsg, wParam,
lParam));
}
break;

//
// Process other messages.
//

default:
return DefWindowProc(hwndMain, uMsg, wParam, lParam);
}
return NULL;
}

Help

← →
Oleg Gashev (2001-11-13 22:21) [3]

/****************************************************************
WH_CALLWNDPROC hook procedure

****************************************************************/

LRESULT WINAPI CallWndProc(int nCode, WPARAM wParam, LPARAM lParam)
{
CHAR szCWPBuf[256];
CHAR szMsg[16];
HDC hdc;
static int c = 0;
int cch;

if (nCode < 0) // do not process message
return CallNextHookEx(myhookdata[CALLWNDPROC].hhook, nCode,
wParam, lParam);

// Call an application-defined function that converts a message

// constant to a string and copies it to a buffer.

LookUpTheMessage((PMSG) lParam, szMsg);

hdc = GetDC(hwndMain);

switch (nCode)
{
case HC_ACTION:
cch = wsprintf(szCWPBuf,
"CALLWNDPROC - tsk: %ld, msg: %s, %d times ",
wParam, szMsg, c++);
TextOut(hdc, 2, 15, szCWPBuf, cch);
break;

default:
break;
}

ReleaseDC(hwndMain, hdc);

return CallNextHookEx(myhookdata[CALLWNDPROC].hhook, nCode,
wParam, lParam);
}

/****************************************************************
WH_GETMESSAGE hook procedure
****************************************************************/

LRESULT CALLBACK GetMsgProc(int nCode, WPARAM wParam, LPARAM lParam)
{
CHAR szMSGBuf[256];
CHAR szRem[16];
CHAR szMsg[16];
HDC hdc;
static int c = 0;
int cch;

if (nCode < 0) // do not process message

return CallNextHookEx(myhookdata[GETMESSAGE].hhook, nCode,
wParam, lParam);

switch (nCode)
{
case HC_ACTION:
switch (wParam)
{
case PM_REMOVE:
lstrcpy(szRem, "PM_REMOVE");
break;

case PM_NOREMOVE:
lstrcpy(szRem, "PM_NOREMOVE");
break;

default:
lstrcpy(szRem, "Unknown");

break;
}

// Call an application-defined function that converts a
// message constant to a string and copies it to a
// buffer.

LookUpTheMessage((PMSG) lParam, szMsg);

hdc = GetDC(hwndMain);
cch = wsprintf(szMSGBuf,
"GETMESSAGE - wParam: %s, msg: %s, %d times ",
szRem, szMsg, c++);
TextOut(hdc, 2, 35, szMSGBuf, cch);

break;

default:
break;
}

ReleaseDC(hwndMain, hdc);
return CallNextHookEx(myhookdata[GETMESSAGE].hhook, nCode,
wParam, lParam);
}

← →
Oleg Gashev (2001-11-13 22:23) [4]

/****************************************************************
WH_DEBUG hook procedure
****************************************************************/

LRESULT CALLBACK DebugProc(int nCode, WPARAM wParam, LPARAM lParam)
{
CHAR szBuf[128];
HDC hdc;

static int c = 0;
int cch;

if (nCode < 0) // do not process message
return CallNextHookEx(myhookdata[DEBUG].hhook, nCode,
wParam, lParam);

hdc = GetDC(hwndMain);

switch (nCode)
{
case HC_ACTION:
cch = wsprintf(szBuf,
"DEBUG - nCode: %d, tsk: %ld, %d times ",
nCode,wParam, c++);
TextOut(hdc, 2, 55, szBuf, cch);
break;

default:
break;
}

ReleaseDC(hwndMain, hdc);
return CallNextHookEx(myhookdata[DEBUG].hhook, nCode, wParam,
lParam);
}

/****************************************************************
WH_CBT hook procedure
****************************************************************/

LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam)
{
CHAR szBuf[128];
CHAR szCode[128];
HDC hdc;

static int c = 0;
int cch;

if (nCode < 0) // do not process message
return CallNextHookEx(myhookdata[CBT].hhook, nCode, wParam,
lParam);

hdc = GetDC(hwndMain);

switch (nCode)
{
case HCBT_ACTIVATE:
lstrcpy(szCode, "HCBT_ACTIVATE");
break;

case HCBT_CLICKSKIPPED:
lstrcpy(szCode, "HCBT_CLICKSKIPPED");
break;

case HCBT_CREATEWND:

lstrcpy(szCode, "HCBT_CREATEWND");
break;

case HCBT_DESTROYWND:
lstrcpy(szCode, "HCBT_DESTROYWND");
break;

case HCBT_KEYSKIPPED:
lstrcpy(szCode, "HCBT_KEYSKIPPED");
break;

case HCBT_MINMAX:
lstrcpy(szCode, "HCBT_MINMAX");
break;

case HCBT_MOVESIZE:
lstrcpy(szCode, "HCBT_MOVESIZE");
break;

case HCBT_QS:
lstrcpy(szCode, "HCBT_QS");
break;

case HCBT_SETFOCUS:
lstrcpy(szCode, "HCBT_SETFOCUS");
break;

case HCBT_SYSCOMMAND:
lstrcpy(szCode, "HCBT_SYSCOMMAND");
break;

default:
lstrcpy(szCode, "Unknown");
break;
}

cch = wsprintf(szBuf, "CBT - nCode: %s, tsk: %ld, %d times ",
szCode, wParam, c++);

TextOut(hdc, 2, 75, szBuf, cch);
ReleaseDC(hwndMain, hdc);
return CallNextHookEx(myhookdata[CBT].hhook, nCode, wParam,
lParam);
}

← →
Oleg Gashev (2001-11-13 22:25) [5]

/****************************************************************
WH_MOUSE hook procedure
****************************************************************/

LRESULT CALLBACK MouseProc(int nCode, WPARAM wParam, LPARAM lParam)
{
CHAR szBuf[128];
CHAR szMsg[16];
HDC hdc;
static int c = 0;

int cch;

if (nCode < 0) // do not process the message
return CallNextHookEx(myhookdata[MOUSE].hhook, nCode,
wParam, lParam);

// Call an application-defined function that converts a message
// constant to a string and copies it to a buffer.

LookUpTheMessage((PMSG) lParam, szMsg);

hdc = GetDC(hwndMain);
cch = wsprintf(szBuf,
"MOUSE - nCode: %d, msg: %s, x: %d, y: %d, %d times ",
nCode, szMsg, LOWORD(lParam), HIWORD(lParam), c++);

TextOut(hdc, 2, 95, szBuf, cch);
ReleaseDC(hwndMain, hdc);
return CallNextHookEx(myhookdata[MOUSE].hhook, nCode, wParam,
lParam);
}

/****************************************************************
WH_KEYBOARD hook procedure
****************************************************************/

LRESULT CALLBACK KeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
{
CHAR szBuf[128];
HDC hdc;
static int c = 0;
int cch;

if (nCode < 0) // do not process message
return CallNextHookEx(myhookdata[KEYBOARD].hhook, nCode,
wParam, lParam);

hdc = GetDC(hwndMain);
cch = wsprintf(szBuf, "KEYBOARD - nCode: %d, vk: %d, %d times ",
nCode, wParam, c++);
TextOut(hdc, 2, 115, szBuf, cch);
ReleaseDC(hwndMain, hdc);
return CallNextHookEx(myhookdata[KEYBOARD].hhook, nCode, wParam,
lParam);
}

/****************************************************************

WH_MSGFILTER hook procedure
****************************************************************/

LRESULT CALLBACK MessageProc(int nCode, WPARAM wParam, LPARAM lParam)
{
CHAR szBuf[128];
CHAR szMsg[16];
CHAR szCode[32];
HDC hdc;
static int c = 0;
int cch;

if (nCode < 0) // do not process message
return CallNextHookEx(myhookdata[MSGFILTER].hhook, nCode,
wParam, lParam);

switch (nCode)
{

case MSGF_DIALOGBOX:
lstrcpy(szCode, "MSGF_DIALOGBOX");
break;

case MSGF_MENU:
lstrcpy(szCode, "MSGF_MENU");
break;

case MSGF_SCROLLBAR:
lstrcpy(szCode, "MSGF_SCROLLBAR");
break;

case MSGF_NEXTWINDOW:
lstrcpy(szCode, "MSGF_NEXTWINDOW");
break;

default:
wsprintf(szCode, "Unknown: %d", nCode);

break;
}

// Call an application-defined function that converts a message
// constant to a string and copies it to a buffer.

LookUpTheMessage((PMSG) lParam, szMsg);

hdc = GetDC(hwndMain);
cch = wsprintf(szBuf,
"MSGFILTER nCode: %s, msg: %s, %d times ",
szCode, szMsg, c++);
TextOut(hdc, 2, 135, szBuf, cch);
ReleaseDC(hwndMain, hdc);
return CallNextHookEx(myhookdata[MSGFILTER].hhook, nCode,

wParam, lParam);
}

(C) Delphi

← →
YUS (2001-11-14 00:31) [6]

Спасибо за помощь

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