[C#] 取得目前视窗title(user32)

1.撰写取得目前视窗title
先取目前画面,再用目前画面去取title
2.测试

    using System.Runtime.InteropServices;

    [DllImport("User32.dll")]    private static extern IntPtr GetForegroundWindow();//取得目前画面视窗    [DllImport("user32.dll")]    static extern int GetWindowText(IntPtr hWnd,System.Text. StringBuilder text, int count);//取视窗title

先取目前画面视窗,再用视窗去取title

        private string GetActiveWindowTitle()        {            const int nChars = 256;            System.Text.StringBuilder Buff = new System.Text.StringBuilder(nChars);            IntPtr handle = GetForegroundWindow();            if (GetWindowText(handle, Buff, nChars) > 0)            {                return Buff.ToString();            }            return null;        }

测试
1.加入timer & 记录focus widow Title
2.run
3.点视窗A,点视窗B,点视窗C,关闭程式
4.查看log,是否记录视窗A,点视窗B,点视窗C的title

        private System.Timers.Timer _TimersTimer;        protected void Page_Load(object sender, EventArgs e)        {            this._TimersTimer = new System.Timers.Timer();            this._TimersTimer.Interval = 100;            this._TimersTimer.Elapsed += new System.Timers.ElapsedEventHandler(_TimersTimer_Elapsed);            this._TimersTimer.Start();        }        void _TimersTimer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)        {            string ret = GetActiveWindowTitle();            logP(ret);        }        //log        private void logP(string str)        {            string filename = @"c:\log.log";            if (System.IO.File.Exists(filename) == false)            {                System.IO.FileStream fileStream = new System.IO.FileStream(filename, System.IO.FileMode.Create);                fileStream.Close();   //切记开了要关,不然会被佔用而无法修改喔!!!            }            using (System.IO.StreamWriter file = new System.IO.StreamWriter(filename, true))            {                file.WriteLine(DateTime.Now.ToString("yyyyMMdd HH:mm:ss:fff") + "  " + str);            }        }