35 lines
1.0 KiB
C#
35 lines
1.0 KiB
C#
using System.Runtime.InteropServices;
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using System.Text;
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namespace WindowWatcher;
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internal static partial class NativeMethods
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{
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[LibraryImport("user32.dll")]
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internal static partial IntPtr GetForegroundWindow();
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[DllImport("user32.dll", CharSet = CharSet.Unicode)]
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internal static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int count);
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[LibraryImport("user32.dll", SetLastError = true)]
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internal static partial uint GetWindowThreadProcessId(IntPtr hWnd, out uint processId);
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[StructLayout(LayoutKind.Sequential)]
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internal struct LASTINPUTINFO
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{
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public uint cbSize;
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public uint dwTime;
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}
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[DllImport("user32.dll")]
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internal static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
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internal static TimeSpan GetIdleTime()
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{
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var info = new LASTINPUTINFO { cbSize = (uint)Marshal.SizeOf<LASTINPUTINFO>() };
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if (!GetLastInputInfo(ref info))
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return TimeSpan.Zero;
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return TimeSpan.FromMilliseconds(Environment.TickCount64 - info.dwTime);
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}
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}
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