使用 C# 和控制台应用程序检测活动 window 已更改

Question

这个问题与这个问题 (Detect active window changed using C# without polling) 非常相似，接受的答案中的代码在 Windows 表单应用程序中工作正常，但在控制台应用程序中却不行。

¿如何在不使用控制台应用程序进行无限迭代（或任何类型的轮询）的情况下检测到活动 window 已更改？

提前致谢。

Answer 1

它可以更改为运行作为控制台应用程序并进行一些更改。这是一个工作代码。

using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            dele = new WinEventDelegate(WinEventProc);
            IntPtr m_hhook = SetWinEventHook(EVENT_SYSTEM_FOREGROUND, EVENT_SYSTEM_FOREGROUND, IntPtr.Zero, dele, 0, 0, WINEVENT_OUTOFCONTEXT);
            Application.Run(); //<----
        }

        static WinEventDelegate dele = null; //STATIC

        delegate void WinEventDelegate(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime);

        [DllImport("user32.dll")]
        static extern IntPtr SetWinEventHook(uint eventMin, uint eventMax, IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags);

        private const uint WINEVENT_OUTOFCONTEXT = 0;
        private const uint EVENT_SYSTEM_FOREGROUND = 3;

        [DllImport("user32.dll")]
        static extern IntPtr GetForegroundWindow();

        [DllImport("user32.dll")]
        static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);

        private static string GetActiveWindowTitle() //STATIC
        {
            const int nChars = 256;
            IntPtr handle = IntPtr.Zero;
            StringBuilder Buff = new StringBuilder(nChars);
            handle = GetForegroundWindow();

            if (GetWindowText(handle, Buff, nChars) > 0)
            {
                return Buff.ToString();
            }
            return null;
        }

        public static void WinEventProc(IntPtr hWinEventHook, uint eventType, IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime) //STATIC
        {
            Console.WriteLine(GetActiveWindowTitle());
        }
    }
}

使用 C# 和控制台应用程序检测活动 window 已更改

Detect active window changed using C# with a console application

c#

console-application

active-window