Jiggler.cs

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#region header

// MouseJiggle - Jiggler.cs
// 
// Alistair J. R. Young
// Arkane Systems
// 
// Copyright Arkane Systems 2012-2013.
// 
// Created: 2013-08-24 12:41 PM

#endregion

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
//|5|1|a|s|p|x
namespace ArkaneSystems.MouseJiggle
{
    public static class Jiggler
    {
        internal const int INPUT_MOUSE = 0;
        internal const int MOUSEEVENTF_MOVE = 0x0001;

        [DllImport ("user32.dll", SetLastError = true)]
        private static extern uint SendInput (uint nInputs, ref INPUT pInputs, int cbSize);

        public static void Jiggle (int dx, int dy)
        {
            var inp = new INPUT ();
            inp.TYPE = Jiggler.INPUT_MOUSE;
            inp.dx = dx;
            inp.dy = dy;
            inp.mouseData = 0;
            inp.dwFlags = Jiggler.MOUSEEVENTF_MOVE;
            inp.time = 0;
            inp.dwExtraInfo = (IntPtr) 0;

            if (SendInput (1, ref inp, 28) != 1)
                throw new Win32Exception ();
        }
    }

    /* This is a kludge, presetting all this, but WTF. It works.
     * And for a program this trivial, who's bothered? */

    internal struct INPUT
    {
        public int TYPE;
        public IntPtr dwExtraInfo;
        public int dwFlags;
        public int dx;
        public int dy;
        public int mouseData;
        public int time;
    }
}