編寫安全的C++鼠標鉤子程序

創建一個安全的C++鼠標鉤子程序需要使用低級別的API函數

#include <iostream>
#include <windows.h>

// 定義一個全局變量來存儲鼠標鉤子的句柄
HHOOK g_hMouseHook = NULL;

// 鼠標鉤子回調函數
LRESULT CALLBACK MouseHookProc(int nCode, WPARAM wParam, LPARAM lParam) {
    if (nCode >= 0) {
        switch (wParam) {
            case WM_MOUSEMOVE:
                std::cout << "Mouse moved to (" << LOWORD(lParam) << ", " << HIWORD(lParam) << ")" << std::endl;
                break;
            case WM_LBUTTONDOWN:
                std::cout << "Left button clicked at (" << LOWORD(lParam) << ", " << HIWORD(lParam) << ")" << std::endl;
                break;
            case WM_RBUTTONDOWN:
                std::cout << "Right button clicked at (" << LOWORD(lParam) << ", " << HIWORD(lParam) << ")" << std::endl;
                break;
            case WM_MBUTTONDOWN:
                std::cout << "Middle button clicked at (" << LOWORD(lParam) << ", " << HIWORD(lParam) << ")" << std::endl;
                break;
        }
    }

    // 調用默認的鼠標鉤子處理程序
    return CallNextHookEx(g_hMouseHook, nCode, wParam, lParam);
}

// 安裝鼠標鉤子
BOOL InstallMouseHook() {
    g_hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, MouseHookProc, GetModuleHandle(NULL), 0);
    if (g_hMouseHook == NULL) {
        std::cerr << "Failed to install mouse hook. Error code: " << GetLastError() << std::endl;
        return FALSE;
    }
    std::cout << "Mouse hook installed successfully." << std::endl;
    return TRUE;
}

// 卸載鼠標鉤子
void UninstallMouseHook() {
    if (g_hMouseHook != NULL) {
        UnhookWindowsHookEx(g_hMouseHook);
        g_hMouseHook = NULL;
        std::cout << "Mouse hook uninstalled successfully." << std::endl;
    } else {
        std::cerr << "Mouse hook is not installed." << std::endl;
    }
}

int main() {
    if (InstallMouseHook()) {
        std::cout << "Press any key to uninstall mouse hook and exit..." << std::endl;
        std::cin.get();
        UninstallMouseHook();
    }
    return 0;
}

這個程序使用SetWindowsHookEx函數安裝一個低級鼠標鉤子，當鼠標移動或點擊時，回調函數MouseHookProc會被調用。在這個函數中，我們處理了鼠標移動、左鍵點擊、右鍵點擊和中鍵點擊事件，并將它們的位置輸出到控制臺。

請注意，這個程序需要在Windows操作系統上運行，并且需要包含windows.h頭文件。此外，這個程序僅適用于C++編譯器，并且需要在Visual Studio或其他支持C++的IDE中編譯和運行。