Win32SDK里提供的例子：监视系统事件：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
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.
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 from the associated menu item.
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);
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 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;
}
/****************************************************************
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);
}
/****************************************************************
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);
}
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);
}
实际上仅使用
WH_JOURNALRECORD 钩子就够了。具体例子可以去搜索引擎上找~~~~~~~