?? ?折騰一天半，終于寫出來了一個Hook實例，代碼如下：
??? Hook.cpp
?1
#include?<TChar.h>
?2
?3#include?"Hook.h"
?4
?5#pragma?data_seg(".JIE")
?6HINSTANCE?_hinst?=?NULL;
?7HWND?_hwnd?=?NULL;
?8HHOOK?_hhook?=?NULL;
?9UINT?_nMsg?=?0;
10#pragma?data_seg()
11#pragma?comment(linker,?"/section:.JIE,rws")
12
13LPCTSTR?HOOK_NOTIFY_MSG_DEF?=?_T("MY_HOOK_NOTIFY_MSG_DEF");
14
15BOOL?WINAPI?DllMain(HINSTANCE?hinst,?DWORD?reason,?LPVOID?reserved)
16
{
17
????switch(reason)
18
????{
19????case?DLL_PROCESS_ATTACH:
20????????_hinst?=?hinst;
21????????break;
22????case?DLL_PROCESS_DETACH:
23????????ClearHook();
24????????break;
25????default:;
26
????}
27????return?TRUE;
28
}
29
30LRESULT?CALLBACK?HookProc(UINT?code,?WPARAM?wparam,?LPARAM?lparam)
31{
32????if(code?>=?0)
33????????SendMessage(_hwnd,?_nMsg,?wparam,?lparam);
34????return?CallNextHookEx(_hhook,?code,?wparam,?lparam);
35}
36
37BOOL?SetHook(HWND?hwnd,?LPCTSTR?classname,?LPCTSTR?wintitle,?UINT*?msgid)
38{
39????if(_hwnd?!=?NULL)
40????????return?FALSE;
41
42????_nMsg?=?RegisterWindowMessage(HOOK_NOTIFY_MSG_DEF);
43????if(_nMsg?==?0)
44????????return?FALSE;
45????*msgid?=?_nMsg;
46
47????HWND?h?=?FindWindow(classname,?wintitle);
48????if(h?==?NULL)
49????????return?FALSE;
50
51????DWORD?tid?=?0;
52????tid?=?GetWindowThreadProcessId(h,?&tid);
53????if(tid?==?0)
54????????return?FALSE;
55
56????_hhook?=?SetWindowsHookEx(WH_KEYBOARD,?(HOOKPROC)HookProc,?_hinst,?tid);
57????if(_hhook?==?NULL)
58????????return?FALSE;
59
60????_hwnd?=?hwnd;
61
62????return?TRUE;
63}
64
65BOOL?ClearHook()
66{
67????if(_hwnd?==?NULL)
68????????return?FALSE;
69????
70????BOOL?uh?=?UnhookWindowsHookEx(_hhook);
71????if(uh?==?FALSE)
72????????return?FALSE;
73
74????_hwnd?=?NULL;
75????
76????return?TRUE;
77} ??? Hook.def
1LIBRARY?HookDll
2EXPORTS
3????SetHook?=?SetHook
4????ClearHook?=?ClearHook ??? 這部分代碼是折騰最久，從我的理解看，應該使范圍內定義的變量實現進程間共享，這樣Hoook和調用Hook的進程才能使用相同的變量值進行通信。用Dumpbin查看，這部分果然是獨立的一個段了。
1#pragma?data_seg(".JIE")
2HINSTANCE?_hinst?=?NULL;
3HWND?_hwnd?=?NULL;
4HHOOK?_hhook?=?NULL;
5UINT?_nMsg?=?0;
6#pragma?data_seg()
7#pragma?comment(linker,?"/section:.JIE,rws") ??? 這里部分測試代碼：
?1void?MyFrame::OnButton1(wxCommandEvent?&event)
?2{
?3????hdll?=?LoadLibrary(_T("../HookDll/Debug/HookDll.dll"));
?4????SetHookPtr?sh?=?(SetHookPtr)GetProcAddress(hdll,?"SetHook");
?5????if(sh((HWND)this->GetHandle(),?_T("Notepad"),?NULL,?&HOOK_NOTIFY_MSG)?!=?TRUE)
?6????{
?7????????wxMessageBox(_("SetHook?Error"));
?8????}
?9}
10
11void?MyFrame::OnButton2(wxCommandEvent?&event)
12{
13????ClearHookPtr?ch?=?(ClearHookPtr)GetProcAddress(hdll,?"ClearHook");
14????if(ch()?!=?TRUE)
15????{
16????????wxMessageBox(_("UnHook?Error"));
17????}
18
19????FreeLibrary(hdll);
20}
21
22WXLRESULT?MyFrame::MSWWindowProc(WXUINT?message,?WXWPARAM?wParam,?WXLPARAM?lParam)
23{
24????if(message?==?HOOK_NOTIFY_MSG)
25????????wxLogDebug(_("msg:%d,?wparam:%d,?lparam:%d"),?message,?wParam,?lParam);
26????return?wxFrame::MSWWindowProc(message,?wParam,?lParam);
27} ?? 寫代碼和打拳類似，要做到拳不離手，不然真是－－三天不打，手生啊。。。