检查用户是否处于非活动状

Question

如何检查用户是否处于非活动状态？我有这个:

class UserActivity : IMessageFilter
{
    private double afk_time = 0.1;//minutes
    private DateTime last_activity = DateTime.Now;
    public static bool inactive = false;

    private int WM_LBUTTONDOWN = 0x0201;
    private int WM_MBUTTONDOWN = 0x0207;
    private int WM_RBUTTONDOWN = 0x0204;
    private int WM_MOUSEWHEEL = 0x020A;
    private int WM_MOUSEMOVE = 0x0200;
    private int WM_KEYDOWN = 0x0100;

    public bool PreFilterMessage(ref Message m)
    {
        if (m.Msg == WM_LBUTTONDOWN || m.Msg == WM_MBUTTONDOWN || m.Msg == WM_RBUTTONDOWN || m.Msg == WM_MOUSEWHEEL || m.Msg == WM_MOUSEMOVE || m.Msg == WM_KEYDOWN)
        {
            this.last_activity = DateTime.Now;
            inactive = false;
        }

        if (DateTime.Now.AddMinutes(-afk_time) > last_activity)
            inactive = true;

        return false;
    }
}

但我必须在Program.cs中运行它

Application.AddMessageFilter(new UserActivity());

我怎么能这样做我可以自己检查用户的不活动状态.我会检查一些复选框,它会开始检查.

我想检查全局用户活动 - 不仅在应用程序中的所有系统.

我不想使用cpu是不必要的.或者我应该使用其他解决方案？

Answer 1

我发现了这个,它完美无缺!所以,如果另一个有问题,这里是解决方案:

    [StructLayout(LayoutKind.Sequential)]
    public struct LASTINPUTINFO
    {
        public uint cbSize;
        public uint dwTime;
    }

    [DllImport("user32.dll")]
    static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);


    public static TimeSpan? GetInactiveTime()
    {
        LASTINPUTINFO info = new LASTINPUTINFO();
        info.cbSize = (uint)Marshal.SizeOf(info);
        if (GetLastInputInfo(ref info))
            return TimeSpan.FromMilliseconds(Environment.TickCount - info.dwTime);
        else
            return null;
    }