关于c ++：在挂接WH_CALLWNDPROC后未获取“窗口过程”消息

Not getting Window Procedure messages after hooking WH_CALLWNDPROC

我尝试使用全局钩子，但是hookprocedure仅收到我的程序线程的窗口过程消息，并且针对特定应用程序(线程)根本没有消息。

我在DLL中针对非本地挂钩正确使用了一个函数。这是我的应用代码。

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#include <Windows.h>
#include <stdio.h>

HINSTANCE hinst;
LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

int main() {
HWND notepad = FindWindow(NULL, L"Untitled - Notepad");

if (!notepad)
return 0;

hinst = GetModuleHandle(NULL);

// create a window class:
WNDCLASS wc = {};
wc.lpfnWndProc = WindowProc;
wc.hInstance = hinst;
wc.lpszClassName = L"hooking";

// register class with operating system:
RegisterClass(&wc);

// create and show window:
HWND hwnd = CreateWindow(L"hooking", L"hooking", WS_OVERLAPPEDWINDOW, 0, 0, 500, 400, NULL, NULL, hinst, NULL);

if (hwnd == NULL) {
return 0;
}

ShowWindow(hwnd, SW_SHOW);

DWORD threadID = GetWindowThreadProcessId(notepad, NULL);

HINSTANCE hinstDLL = LoadLibrary(TEXT("..\\\\Debug\\\\ProcHookDLL.dll"));

void (*AttachHookProc)(DWORD);
AttachHookProc = (void (*)(DWORD)) GetProcAddress(hinstDLL,"AttachHook");
AttachHookProc(threadID);

// handle messages:
MSG msg = {};

while(GetMessage(&msg, hwnd, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}

printf("Done execution... press any key to exit");
char garbage = getchar();
return 0;
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
if (uMsg == WM_DESTROY) {
PostQuitMessage(0);
}
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

这是DLL的代码。我没有收到任何消息是有原因的吗？

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#include <Windows.h>
#include <stdio.h>

// TODO: create a mutex so this can only be loaded once
HMODULE thisModule;
HHOOK hook;
LRESULT CALLBACK LaunchListener(int nCode, WPARAM wParam, LPARAM lParam);

BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved)
{
thisModule = hModule;

// Very restricted set of things that can be done in DllMain, refer to documentation
// before adding anything here.

switch (ul_reason_for_call) {
case DLL_PROCESS_ATTACH:
case DLL_THREAD_ATTACH:
break;
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}

#ifdef __cplusplus // If used by C++ code,
extern"C" { // we need to export the C interface
#endif
//window message loop is necessary for hooks to work? (didn't work with console app)
//provide function pointer to execute when notepad is launched.
__declspec(dllexport) void AttachHook(DWORD threadID) {
hook = SetWindowsHookEx(WH_CALLWNDPROC, LaunchListener, thisModule, threadID);
}
#ifdef __cplusplus
}
#endif

LRESULT CALLBACK LaunchListener(int nCode, WPARAM wParam, LPARAM lParam) {
// process event here
if (nCode >= 0) {
//wparam specifies if the message was sent by the current thread or not.
CWPSTRUCT * cwp = (CWPSTRUCT *)lParam;
wchar_t windowName[256];
GetWindowText(cwp->hwnd, windowName, 256);
wprintf(L"%#8X: %s\
", cwp->message, windowName);
if (cwp->message == WM_CREATE) {
__debugbreak();
wchar_t moduleName[256];
//cwp->hwnd
//GetModuleFileName(0, moduleName, 256);
GetWindowText(cwp->hwnd, moduleName, 256);
int x = 0;
x++;
}
}

return CallNextHookEx(NULL, nCode, wParam, lParam);
}