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using System;
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using System.IO;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using System.Windows.Forms;
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using Microsoft.Win32.SafeHandles;
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//
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using Hid = SharpLib.Hid;
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using SharpLib.Win32;
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namespace SharpDisplayManager
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{
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/// <summary>
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/// Implement handling of HID input reports notably to be able to launch an application using the Green Start button from IR remotes.
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/// </summary>
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[System.ComponentModel.DesignerCategory("Code")]
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public class MainFormHid : Form
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{
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[System.Runtime.InteropServices.DllImportAttribute("user32.dll", EntryPoint = "SwitchToThisWindow")]
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public static extern void SwitchToThisWindow([System.Runtime.InteropServices.InAttribute()] System.IntPtr hwnd, [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.Bool)] bool fUnknown);
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//
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public delegate void OnHidEventDelegate(object aSender, Hid.Event aHidEvent);
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/// <summary>
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/// Use notably to handle green start key from IR remote control
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/// </summary>
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private Hid.Handler iHidHandler;
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/// <summary>
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/// Register HID devices so that we receive corresponding WM_INPUT messages.
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/// </summary>
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protected void RegisterHidDevices()
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{
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// Register the input device to receive the commands from the
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// remote device. See http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/remote_control.asp
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// for the vendor defined usage page.
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RAWINPUTDEVICE[] rid = new RAWINPUTDEVICE[5];
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int i = 0;
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rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.WindowsMediaCenterRemoteControl;
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rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.WindowsMediaCenter.WindowsMediaCenterRemoteControl;
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rid[i].dwFlags = Const.RIDEV_INPUTSINK;
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rid[i].hwndTarget = Handle;
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i++;
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rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.Consumer;
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rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.Consumer.ConsumerControl;
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rid[i].dwFlags = Const.RIDEV_INPUTSINK;
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rid[i].hwndTarget = Handle;
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i++;
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rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.Consumer;
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rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.Consumer.Selection;
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rid[i].dwFlags = Const.RIDEV_INPUTSINK;
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rid[i].hwndTarget = Handle;
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i++;
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rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.GenericDesktopControls;
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rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.GenericDesktop.SystemControl;
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rid[i].dwFlags = Const.RIDEV_INPUTSINK;
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rid[i].hwndTarget = Handle;
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i++;
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rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.GenericDesktopControls;
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rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.GenericDesktop.GamePad;
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rid[i].dwFlags = Const.RIDEV_INPUTSINK;
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rid[i].hwndTarget = Handle;
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//i++;
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//rid[i].usUsagePage = (ushort)SharpLib.Hid.UsagePage.GenericDesktopControls;
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//rid[i].usUsage = (ushort)SharpLib.Hid.UsageCollection.GenericDesktop.Keyboard;
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//rid[i].dwFlags = Const.RIDEV_EXINPUTSINK;
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//rid[i].hwndTarget = Handle;
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//i++;
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//rid[i].usUsagePage = (ushort)Hid.UsagePage.GenericDesktopControls;
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//rid[i].usUsage = (ushort)Hid.UsageCollection.GenericDesktop.Mouse;
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//rid[i].dwFlags = Const.RIDEV_EXINPUTSINK;
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//rid[i].hwndTarget = aHWND;
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iHidHandler = new SharpLib.Hid.Handler(rid);
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if (!iHidHandler.IsRegistered)
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{
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Debug.WriteLine("Failed to register raw input devices: " + Marshal.GetLastWin32Error().ToString());
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}
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iHidHandler.OnHidEvent += HandleHidEventThreadSafe;
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}
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/// <summary>
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/// Here we receive HID events from our HID library.
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/// </summary>
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/// <param name="aSender"></param>
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/// <param name="aHidEvent"></param>
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public void HandleHidEventThreadSafe(object aSender, SharpLib.Hid.Event aHidEvent)
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{
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if (aHidEvent.IsStray)
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{
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//Stray event just ignore it
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return;
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}
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if (this.InvokeRequired)
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{
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//Not in the proper thread, invoke ourselves
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OnHidEventDelegate d = new OnHidEventDelegate(HandleHidEventThreadSafe);
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this.Invoke(d, new object[] { aSender, aHidEvent });
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}
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else
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{
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if (aHidEvent.Usages.Count == 0)
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{
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//No usage, nothing to do then
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return;
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}
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//We are in the proper thread
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if (aHidEvent.UsagePage == (ushort) Hid.UsagePage.WindowsMediaCenterRemoteControl)
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{
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switch (aHidEvent.Usages[0])
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{
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case (ushort)Hid.Usage.WindowsMediaCenterRemoteControl.GreenStart:
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HandleGreenStart();
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break;
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case (ushort)Hid.Usage.WindowsMediaCenterRemoteControl.Eject:
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case (ushort)Hid.Usage.WindowsMediaCenterRemoteControl.Ext2:
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HandleEject();
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break;
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}
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}
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}
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}
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private SafeFileHandle OpenVolume()
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{
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return Function.CreateFile( "E:",
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SharpLib.Win32.FileAccess.GENERIC_READ,
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SharpLib.Win32.FileShare.FILE_SHARE_READ | SharpLib.Win32.FileShare.FILE_SHARE_WRITE,
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IntPtr.Zero,
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CreationDisposition.OPEN_EXISTING,
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0,
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IntPtr.Zero);
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}
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/// <summary>
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///
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/// </summary>
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private void HandleEject()
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{
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SafeFileHandle handle = OpenVolume();
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}
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/// <summary>
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///
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/// </summary>
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private void HandleGreenStart()
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{
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//First check if the process we want to launch already exists
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string procName = Path.GetFileNameWithoutExtension(Properties.Settings.Default.StartFileName);
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Process[] existingProcesses = Process.GetProcessesByName(procName);
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if (existingProcesses == null || existingProcesses.Length == 0)
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{
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// Process do not exists just try to launch it
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ProcessStartInfo start = new ProcessStartInfo();
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// Enter in the command line arguments, everything you would enter after the executable name itself
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//start.Arguments = arguments;
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// Enter the executable to run, including the complete path
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start.FileName = Properties.Settings.Default.StartFileName;
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start.WindowStyle = ProcessWindowStyle.Normal;
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start.CreateNoWindow = true;
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start.UseShellExecute = true;
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// Run the external process & wait for it to finish
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Process proc = Process.Start(start);
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//SL: We could have used that too
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//Shell32.Shell shell = new Shell32.Shell();
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//shell.ShellExecute(Properties.Settings.Default.StartFileName);
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}
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else
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{
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//This won't work properly until we have a manifest that enables uiAccess.
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//However uiAccess just won't work with ClickOnce so we will have to use a different deployment system.
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SwitchToThisWindow(existingProcesses[0].MainWindowHandle, true);
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}
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}
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/// <summary>
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/// We need to handle WM_INPUT.
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/// </summary>
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/// <param name="message"></param>
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protected override void WndProc(ref Message message)
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{
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switch (message.Msg)
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{
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case Const.WM_INPUT:
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//Returning zero means we processed that message.
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message.Result = new IntPtr(0);
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iHidHandler.ProcessInput(ref message);
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break;
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}
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//Is that needed? Check the docs.
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base.WndProc(ref message);
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}
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}
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}
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