如何在键盘出现之前获取键盘帧

#include <iostream>
#include <Windows.h>

// 键盘钩子回调函数
LRESULT CALLBACK KeyboardHookCallback(int nCode, WPARAM wParam, LPARAM lParam)
{
    if (nCode >= 0)
    {
        // 获取键盘帧数据
        KBDLLHOOKSTRUCT* pKeyboardData = (KBDLLHOOKSTRUCT*)lParam;
        // 处理键盘帧数据
        // ...
    }

    // 继续传递钩子消息给下一个钩子或目标窗口
    return CallNextHookEx(NULL, nCode, wParam, lParam);
}

int main()
{
    // 安装键盘钩子
    HHOOK hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookCallback, NULL, 0);
    if (hKeyboardHook == NULL)
    {
        std::cout << "Failed to install keyboard hook!" << std::endl;
        return 1;
    }

    // 消息循环，保持程序运行
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    // 卸载键盘钩子
    UnhookWindowsHookEx(hKeyboardHook);

    return 0;
}