获取鼠标和键盘长时间不动的时间

转载：
using System.Runtime.InteropServices;

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

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

static long GetLastInputTime()
{
    LASTINPUTINFO vLastInputInfo = new LASTINPUTINFO();
    vLastInputInfo.cbSize = Marshal.SizeOf(vLastInputInfo);
    if (!GetLastInputInfo(ref vLastInputInfo)) return 0;
    return Environment.TickCount - (long)vLastInputInfo.dwTime;
}

private void Form1_Load(object sender, EventArgs e)
{
    timer1.Enabled = true;
}

private void timer1_Tick(object sender, EventArgs e)
{
    Text = string.Format("用户已经{0}秒没有路过了", GetLastInputTime() / 1000);
    //比如： if (GetLastInputTime() > 1000 * 60) Close(); //用户一分钟不操作
}
来源：http://tmsoft.lsxy.com/index.php?load=read&id=186