项目中常用的Windows API函数

一，获取鼠标键盘空闲时间

        /// <summary>
        /// 获取鼠标键盘空闲时间
        /// </summary>
        /// <returns></returns>
        public static long GetIdleTick()
        {
            LASTINPUTINFO lastInputInfo = new LASTINPUTINFO();
            lastInputInfo.cbSize = Marshal.SizeOf(lastInputInfo);
            if (!GetLastInputInfo(ref　lastInputInfo)) return 0;
            return Environment.TickCount - (long)lastInputInfo.dwTime;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct LASTINPUTINFO
        {
            [MarshalAs(UnmanagedType.U4)]
            public int cbSize;
            [MarshalAs(UnmanagedType.U4)]
            public uint dwTime;
        }

        /// <summary>
        /// 调用windows API获取鼠标键盘空闲时间
        /// </summary>
        /// <param name="plii"></param>
        /// <returns></returns>
        [DllImport("user32.dll")]
        private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);

 

 二，设置系统时间

        private struct SYSTEMTIME
        {
            public short year;
            public short month;
            public short dayOfWeek;
            public short day;
            public short hour;
            public short minute;
            public short second;
            public short milliseconds;
        }

        [DllImport("kernel32.dll")]
        private static extern bool SetLocalTime(ref SYSTEMTIME time);

        public static void SetDate(DateTime dt)
        {
            SYSTEMTIME st;

            st.year = (short)dt.Year;
            st.month = (short)dt.Month;
            st.dayOfWeek = (short)dt.DayOfWeek;
            st.day = (short)dt.Day;
            st.hour = (short)dt.Hour;
            st.minute = (short)dt.Minute;
            st.second = (short)dt.Second;
            st.milliseconds = (short)dt.Millisecond;

            SetLocalTime(ref st);
        }

 

三，窗体任务栏闪烁效果

    [Flags]
    public enum FlashMode
    {
        /// <summary>
        /// Stop flashing. The system restores the window to its original state.
        /// </summary>
        FLASHW_STOP = 0,
        /// <summary>
        /// Flash the window caption.
        /// </summary>
        FLASHW_CAPTION = 1,
        /// <summary>
        /// Flash the taskbar button.
        /// </summary>
        FLASHW_TRAY = 2,
        /// <summary>
        /// Flash both the window caption and taskbar button.
        /// This is equivalent to setting the FLASHW_CAPTION | FLASHW_TRAY flags.
        /// </summary>
        FLASHW_ALL = 3,
        /// <summary>
        /// Flash continuously, until the FLASHW_STOP flag is set.
        /// </summary>
        FLASHW_TIMER = 4,
        /// <summary>
        /// Flash continuously until the window comes to the foreground.
        /// </summary>
        FLASHW_TIMERNOFG = 12
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct FLASHWINFO
    {
        public UInt32 cbSize;
        public IntPtr hwnd;
        public UInt32 dwFlags;
        public UInt32 uCount;
        public UInt32 dwTimeout;
    }

   

        /// <summary>
        /// 窗体任务栏闪烁
        /// </summary>
        /// <param name="hWnd">handle of window</param>
        /// <param name="bInvert">flash status</param>
        /// <returns></returns>
        [DllImport("user32.dll")]
        public static extern bool FlashWindow(IntPtr hWnd,bool bInvert);

        [DllImport("user32.dll")]
        public static extern bool FlashWindowEx(ref FLASHWINFO pwfi);

        public static bool FlashWindowEx(IntPtr hWnd, FlashMode fm)
        {
            FLASHWINFO fInfo = new FLASHWINFO();

            fInfo.cbSize = Convert.ToUInt32(Marshal.SizeOf(fInfo));
            fInfo.hwnd = hWnd;
            fInfo.dwFlags = (UInt32)fm;
            fInfo.uCount = UInt32.MaxValue;
            fInfo.dwTimeout = 0;

            return FlashWindowEx(ref fInfo);
        }