C#刷搜狗输入法累计输入

实现方法：通过Windows API监控键盘输入，统计用户的输入次数。

具体实现步骤如下：

1. 引入Windows API

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hMod, uint dwThreadId);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern bool UnhookWindowsHookEx(IntPtr hhk);

2. 定义回调函数

private delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam);

private static HookProc hookCallback = new HookProc(HookCallback);

3. 设置钩子

private const int WH_KEYBOARD_LL = 13;
private static IntPtr hookHandle = IntPtr.Zero;

private static IntPtr SetHook(HookProc hookCallback)
{
    using (Process process = Process.GetCurrentProcess())
    {
        using (ProcessModule module = process.MainModule)
        {
            return SetWindowsHookEx(WH_KEYBOARD_LL, hookCallback, GetModuleHandle(module.ModuleName), 0);
        }
    }
}

4. 处理回调函数

private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
    if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
    {
        int vkCode = Marshal.ReadInt32(lParam);
        if (vkCode >= 0x41 && vkCode <= 0x5A)
        {
            inputCount++;
            Console.WriteLine("当前输入次数：" + inputCount);
        }
    }
    return CallNextHookEx(hookHandle, nCode, wParam, lParam);
}

5. 启动钩子

hookHandle = SetHook(hookCallback);

6. 取消钩子

UnhookWindowsHookEx(hookHandle);

完整代码如下：

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

namespace InputCount
{
    class Program
    {
        private const int WH_KEYBOARD_LL = 13;
        private const int WM_KEYDOWN = 0x0100;
        private static IntPtr hookHandle = IntPtr.Zero;
        private static int inputCount = 0;

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hMod, uint dwThreadId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern bool UnhookWindowsHookEx(IntPtr hhk);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string lpModuleName);

        private delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam);

        private static HookProc hookCallback = new HookProc(HookCallback);

        private static IntPtr SetHook(HookProc hookCallback)
        {
            using (Process process = Process.GetCurrentProcess())
            {
                using (ProcessModule module = process.MainModule)
                {
                    return SetWindowsHookEx(WH_KEYBOARD_LL, hookCallback, GetModuleHandle(module.ModuleName), 0);
                }
            }
        }

        private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
        {
            if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
            {
                int vkCode = Marshal.ReadInt32(lParam);
                if (vkCode >= 0x41 && vkCode <= 0x5A)
                {
                    inputCount++;
                    Console.WriteLine("当前输入次数：" + inputCount);
                }
            }
            return CallNextHookEx(hookHandle, nCode, wParam, lParam);
        }

        static void Main(string[] args)
        {
            hookHandle = SetHook(hookCallback);

            Console.WriteLine("按任意键退出...");
            Console.ReadKey();

            UnhookWindowsHookEx(hookHandle);
        }
    }
}