如何在C#中实现游戏自动按键宏，支持指定窗口触发和手动中断？

核心逻辑说明 #

• 按键模拟：调用Windows原生API PostMessage 向目标窗口发送按键按下（WM_KEYDOWN）、按键释放（WM_KEYUP）消息，可自由组合实现按下不释放、单击两种操作
• 窗口限定：通过GetForegroundWindow获取当前活动窗口句柄，每次发送按键前校验当前活动窗口是否为启动时记录的目标窗口，不匹配则不发送按键
• 中止逻辑：通过GetAsyncKeyState API实时检测中止键状态，只要检测到按键被按下就立刻跳出执行循环

完整修改后代码 #

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Threading;

namespace BedWarsDropBot
{
    public class Program
    {
        // Win32 API 声明
        [DllImport("user32.dll")]
        private static extern bool PostMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();
        [DllImport("user32.dll")]
        private static extern short GetAsyncKeyState(int vKey);

        // 按键消息常量
        private const uint WM_KEYDOWN = 0x0100;
        private const uint WM_KEYUP = 0x0101;

        public static void Main(string[] args)
        {
            Console.WriteLine("BedWars Drop Bot.\n\n");
            Console.WriteLine("This is a bot for dropping items on Bedwars. To start dropping, press V. To stop dropping, press X. To close, press Z.\n");
            var option = Console.ReadKey();
            bool isRunning = true;
            switch (option.Key)
            {
                case ConsoleKey.V:
                    Console.WriteLine("\nPlease enter your drop key/the key you would like to be pressed:\n");
                    var pressKey = Console.ReadKey();
                    Console.WriteLine("\nThe program is giving you 5 seconds to open up Bedwars, so that the program can start doing what it is meant to.");
                    Thread.Sleep(5000);
                    // 记录5秒后当前的活动窗口作为目标窗口
                    IntPtr targetWindow = GetForegroundWindow();
                    Console.WriteLine("已绑定目标窗口，自动按键开始，按X可终止");
                    while (isRunning)
                    {
                        // 检测是否按下中止键X
                        if (GetAsyncKeyState((int)ConsoleKey.X) != 0)
                        {
                            isRunning = false;
                            Console.WriteLine("已终止自动按键流程");
                            break;
                        }
                        // 校验当前活动窗口是否为目标窗口
                        if (GetForegroundWindow() != targetWindow)
                        {
                            Thread.Sleep(10);
                            continue;
                        }
                        // 单击按键实现：按下+释放
                        PostMessage(targetWindow, WM_KEYDOWN, (IntPtr)pressKey.Key, IntPtr.Zero);
                        Thread.Sleep(10);
                        PostMessage(targetWindow, WM_KEYUP, (IntPtr)pressKey.Key, IntPtr.Zero);
                        // 两次按键的间隔，可根据需求调整
                        Thread.Sleep(100);

                        // 若需要实现按下不释放的操作，仅保留WM_KEYDOWN逻辑，需要释放时再发送WM_KEYUP即可
                    }
                    break;
                case ConsoleKey.X:
                    break;
                case ConsoleKey.Z:
                    Console.WriteLine("\nYou chose to close this program. Are you sure? [Y] [N]:\n");
                    var closeKey = Console.ReadKey();
                    switch (closeKey.Key)
                    {
                        case ConsoleKey.Y:
                            Environment.Exit(0);
                            break;
                        case ConsoleKey.N:
                            Process.Start(AppDomain.CurrentDomain.FriendlyName);
                            Environment.Exit(0);
                            break;
                    }
                    break;
            }
        }
    }
}

额外说明 #

• 代码中所有时间间隔参数都可以根据实际使用需求调整，避免操作过快被游戏检测
• 若需要实现长按不释放的操作，只需在需要按下的时机发送一次WM_KEYDOWN消息，需要释放时再发送WM_KEYUP消息即可
• 所有API均为Windows系统原生接口，.NET Core 3.0+版本在Win10环境下可直接运行，不需要额外依赖Windows Forms组件

内容的提问来源于stack exchange，提问作者user14224713