C# 检测所有窗口中的按键事件

Question

嘿，我对关键事件处理程序有一些问题。这是来源：

using System;
        using System.Collections.Generic;
        using System.ComponentModel;
        using System.Data;
        using System.Drawing;
        using System.Linq;
        using System.Text;
        using System.Windows.Forms;
        using System.Diagnostics;
        using System.Threading;

        namespace WindowsFormsApplication3
        {
            public partial class Form1 : Form
            {
                public Form1()
                {
                    InitializeComponent();
                }

                [System.Runtime.InteropServices.DllImport("user32.dll")]
                public static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);


        public const int MOUSEEVENTF_LEFTDOWN = 0x02;
        public const int MOUSEEVENTF_LEFTUP = 0x04;
        public const int MOUSEEVENTF_RIGHTDOWN = 0x08;
        public const int MOUSEEVENTF_RIGHTUP = 0x10;


                public void Form1_KeyPessed(object sender, KeyEventArgs e)
                {
                    if (e.KeyCode == Keys.F2)
                    {
                        DrawSquare();
                    }
                }

                public void DrawSquare()
                {
                    int line = Convert.ToInt16(textBox1.Text);
                    int time = Convert.ToInt16(textBox2.Text);

                    int x = MousePosition.X;
                    int y = MousePosition.Y;
                    Cursor.Position = new Point(x - line / 2, y - line / 2);
                    mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0);
                    Thread.Sleep(time);
                    Cursor.Position = new Point(x - line / 2, y + line / 2);
                    Thread.Sleep(time);
                    Cursor.Position = new Point(x - line / 2, y + line / 2);
                    Thread.Sleep(time);
                    Cursor.Position = new Point(x + line / 2, y - line / 2);
                    Thread.Sleep(time);
                    Cursor.Position = new Point(x - line / 2, y - line / 2);
                    mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0);
                    Thread.Sleep(time);
                    Cursor.Position = new Point(x, y);
                }
            }      
        }

现在，当我在表单中按 F2 时，它只会绘制正方形，但我希望它适用于所有窗口。 我还需要什么？ （这是一种完美形状的自动抽屉）

Answer 1

如果您只想处理几个组合键，可以使用 RegisterHotKey。如果您想检测所有不同的按键事件，请使用 全局按照保罗的建议进行钩子。

Answer 2

你需要一个全局钩子。这里有一个出色的实现 http://www.codeproject.com/KB/cs/globalhook。 ASPX