[DllImport("user32.dll")]static extern IntPtr GetForegroundWindow();[DllImport("user32.dll")]static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);[DllImport("user32.dll")]static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);[DllImport("psapi.dll")]static extern int GetProcessImageFileName(IntPtr hProcess, StringBuilder lpImageFileName, int nSize);const int nChars = 256;static StringBuilder buff = new StringBuilder(nChars);private ActiveInfo GetActiveWindow(){    IntPtr handle = GetForegroundWindow();    GetWindowThreadProcessId(handle, out uint id);    if (GetWindowText(handle, buff, nChars) > 0)    {        Process p = Process.GetProcessById((int)id);        string desc = string.Empty;        string filename = string.Empty;        try        {            ProcessModule main = p.MainModule;            if (main != null)            {                filename = main.FileName;                desc = main.FileVersionInfo.FileDescription;            }        }        catch (Exception)        {        }        return new ActiveInfo{         Title = buff.ToString(),          FileName = filename,         Desc= desc,         Pid  = id       };    }    return new ActiveInfo();}public sealed class ActiveInfo{    public string Title { get; set; } = string.Empty;    public string FileName { get; set; } = string.Empty;    public string Desc { get; set; } = string.Empty;    public uint Pid { get; set; }}