‘ read/write handle to the devicePrivate mHandle As SafeFileHandle‘ a pretty .NET stream to read/write from/toPrivate mStream As FileStreamPrivate found As Boolean = FalsePrivate guid As GuidPrivate index As UInteger = 0‘ 1. get the GUID of the HID classHIDImports.HidD_GetHidGuid(guid)‘ 2. get a handle to all devices that are part of the HID classDim hDevInfo As IntPtr = HIDImports.SetupDiGetClassDevs(guid, Nothing, IntPtr.Zero, HIDImports.DIGCF_DEVICEINTERFACE) ‘ | HIDImports.DIGCF_PRESENT);‘ create a new interface data struct and initialize its sizeDim diData As HIDImports.SP_DEVICE_INTERFACE_DATA = http://www.mamicode.com/New HIDImports.SP_DEVICE_INTERFACE_DATA()diData.cbSize = Marshal.SizeOf(diData)‘ 3. get a device interface to a single device (enumerate all devices)Do While HIDImports.SetupDiEnumDeviceInterfaces(hDevInfo, IntPtr.Zero, guid, index, diData)    ‘ create a detail struct and set its size    Dim diDetail As HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA = http://www.mamicode.com/New HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA()    diDetail.cbSize = 5 ‘should be: (uint)Marshal.SizeOf(diDetail);, but that‘s the wrong size    Dim size As UInt32 = 0    ‘ get the buffer size for this device detail instance (returned in the size parameter)    HIDImports.SetupDiGetDeviceInterfaceDetail(hDevInfo, diData, IntPtr.Zero, 0, size, IntPtr.Zero)    ‘ actually get the detail struct    If HIDImports.SetupDiGetDeviceInterfaceDetail(hDevInfo, diData, diDetail, size, size, IntPtr.Zero) Then        ‘ open a read/write handle to our device using the DevicePath returned        mHandle = HIDImports.CreateFile(diDetail.DevicePath, FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, HIDImports.EFileAttributes.Overlapped, IntPtr.Zero)        ‘ 4. create an attributes struct and initialize the size        Dim attrib As HIDImports.HIDD_ATTRIBUTES = New HIDImports.HIDD_ATTRIBUTES()        attrib.Size = Marshal.SizeOf(attrib)        ‘ get the attributes of the current device        If HIDImports.HidD_GetAttributes(mHandle.DangerousGetHandle(), attrib) Then            ‘ if the vendor and product IDs match up            If attrib.VendorID = VID AndAlso attrib.ProductID = PID Then                ‘ 5. create a nice .NET FileStream wrapping the handle above                mStream = New FileStream(mHandle, FileAccess.ReadWrite, REPORT_LENGTH, True)            Else                mHandle.Close()            End If        End If    End If    ‘ move to the next device    index += 1Loop‘ 6. clean up our listHIDImports.SetupDiDestroyDeviceInfoList(hDevInfo)

// read/write handle to the deviceprivate SafeFileHandle mHandle;// a pretty .NET stream to read/write from/toprivate FileStream mStream;bool found = false;Guid guid;uint index = 0;// 1. get the GUID of the HID classHIDImports.HidD_GetHidGuid(out guid);// 2. get a handle to all devices that are part of the HID classIntPtr hDevInfo = HIDImports.SetupDiGetClassDevs(ref guid, null, IntPtr.Zero, HIDImports.DIGCF_DEVICEINTERFACE);// | HIDImports.DIGCF_PRESENT);// create a new interface data struct and initialize its sizeHIDImports.SP_DEVICE_INTERFACE_DATA diData = http://www.mamicode.com/new HIDImports.SP_DEVICE_INTERFACE_DATA();diData.cbSize = Marshal.SizeOf(diData);// 3. get a device interface to a single device (enumerate all devices)while(HIDImports.SetupDiEnumDeviceInterfaces(hDevInfo, IntPtr.Zero, ref guid, index, ref diData)){    // create a detail struct and set its size    HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA diDetail = new HIDImports.SP_DEVICE_INTERFACE_DETAIL_DATA();    diDetail.cbSize = 5; //should be: (uint)Marshal.SizeOf(diDetail);, but that‘s the wrong size    UInt32 size = 0;    // get the buffer size for this device detail instance (returned in the size parameter)    HIDImports.SetupDiGetDeviceInterfaceDetail(hDevInfo, ref diData, IntPtr.Zero, 0, out size, IntPtr.Zero);    // actually get the detail struct    if(HIDImports.SetupDiGetDeviceInterfaceDetail(hDevInfo, ref diData, ref diDetail, size, out size, IntPtr.Zero))    {        // open a read/write handle to our device using the DevicePath returned        mHandle = HIDImports.CreateFile(diDetail.DevicePath, FileAccess.ReadWrite, FileShare.ReadWrite, IntPtr.Zero, FileMode.Open, HIDImports.EFileAttributes.Overlapped, IntPtr.Zero);        // 4. create an attributes struct and initialize the size        HIDImports.HIDD_ATTRIBUTES attrib = new HIDImports.HIDD_ATTRIBUTES();        attrib.Size = Marshal.SizeOf(attrib);        // get the attributes of the current device        if(HIDImports.HidD_GetAttributes(mHandle.DangerousGetHandle(), ref attrib))        {            // if the vendor and product IDs match up            if(attrib.VendorID == VID && attrib.ProductID == PID)            {                // 5. create a nice .NET FileStream wrapping the handle above                mStream = new FileStream(mHandle, FileAccess.ReadWrite, REPORT_LENGTH, true);            }            else                mHandle.Close();        }    }    // move to the next device    index++;}// 6. clean up our listHIDImports.SetupDiDestroyDeviceInfoList(hDevInfo);

‘ sure, we could find this out the hard way using HID, but trust me, it‘s 22Private Const REPORT_LENGTH As Integer = 22‘ report bufferPrivate mBuff As Byte() = New Byte(REPORT_LENGTH - 1){}Private Sub BeginAsyncRead()    ‘ if the stream is valid and ready    If mStream.CanRead Then        ‘ create a read buffer of the report size        Dim buff As Byte() = New Byte(REPORT_LENGTH - 1){}        ‘ setup the read and the callback        mStream.BeginRead(buff, 0, REPORT_LENGTH, New AsyncCallback(AddressOf OnReadData), buff)    End IfEnd SubPrivate Sub OnReadData(ByVal ar As IAsyncResult)    ‘ grab the byte buffer    Dim buff As Byte() = CType(ar.AsyncState, Byte())    ‘ end the current read    mStream.EndRead(ar)    ‘ start reading again    BeginAsyncRead()    ‘ handle data....End Sub

// sure, we could find this out the hard way using HID, but trust me, it‘s 22private const int REPORT_LENGTH = 22;// report bufferprivate byte[] mBuff = new byte[REPORT_LENGTH];private void BeginAsyncRead(){    // if the stream is valid and ready    if(mStream.CanRead)    {        // create a read buffer of the report size        byte[] buff = new byte[REPORT_LENGTH];        // setup the read and the callback        mStream.BeginRead(buff, 0, REPORT_LENGTH, new AsyncCallback(OnReadData), buff);    }}private void OnReadData(IAsyncResult ar){    // grab the byte buffer    byte[] buff = (byte[])ar.AsyncState;    // end the current read    mStream.EndRead(ar);    // start reading again    BeginAsyncRead();        // handle data....}

Imports WiimoteLibPrivate Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)    ‘ create a new instance of the Wiimote    Dim wm As Wiimote = New Wiimote()    ‘ setup the event to handle state changes    AddHandler wm.WiimoteChanged, AddressOf wm_WiimoteChanged    ‘ setup the event to handle insertion/removal of extensions    AddHandler wm.WiimoteExtensionChanged, AddressOf wm_WiimoteExtensionChanged    ‘ connect to the Wiimote    wm.Connect()    ‘ set the report type to return the IR sensor and accelerometer data (buttons always come back)    wm.SetReportType(Wiimote.InputReport.IRAccel, True)End SubPrivate Sub wm_WiimoteExtensionChanged(ByVal sender As Object, ByVal args As WiimoteExtensionChangedEventArgs)    If args.Inserted Then        wm.SetReportType(Wiimote.InputReport.IRExtensionAccel, True) ‘ return extension data    Else        wm.SetReportType(Wiimote.InputReport.IRAccel, True) ‘ back to original mode    End IfEnd SubPrivate Sub wm_OnWiimoteChanged(ByVal sender As Object, ByVal args As WiimoteChangedEventArgs)    ‘ current state information    Dim ws As WiimoteState = args.WiimoteState    ‘ write out the state of the A button        Debug.WriteLine(ws.ButtonState.A)End Sub

using WiimoteLib;private void Form1_Load(object sender, EventArgs e){    // create a new instance of the Wiimote    Wiimote wm = new Wiimote();        // setup the event to handle state changes    wm.WiimoteChanged += wm_WiimoteChanged;        // setup the event to handle insertion/removal of extensions    wm.WiimoteExtensionChanged += wm_WiimoteExtensionChanged;        // connect to the Wiimote    wm.Connect();        // set the report type to return the IR sensor and accelerometer data (buttons always come back)    wm.SetReportType(Wiimote.InputReport.IRAccel, true);}void wm_WiimoteExtensionChanged(object sender, WiimoteExtensionChangedEventArgs args){    if(args.Inserted)        wm.SetReportType(Wiimote.InputReport.IRExtensionAccel, true);    // return extension data    else        wm.SetReportType(Wiimote.InputReport.IRAccel, true);            // back to original mode}void wm_WiimoteChanged(object sender, WiimoteChangedEventArgs args){    // current state information    WiimoteState ws = args.WiimoteState;    // write out the state of the A button        Debug.WriteLine(ws.ButtonState.A);}

Dim wc As New WiimoteCollection()wc.FindAllWiimotes()For Each wm As Wiimote In wc    AddHandler wm.WiimoteChanged, AddressOf wm_WiimoteChanged    AddHandler wm.WiimoteExtensionChanged, AddressOf wm_WiimoteExtensionChanged        wm.Connect()    wm.SetReportType(InputReport.IRAccel, True)Next wm

WiimoteCollection wc = new WiimoteCollection();wc.FindAllWiimotes();foreach(Wiimote wm in wc){    wm.WiimoteChanged += wm_WiimoteChanged;    wm.WiimoteExtensionChanged += wm_WiimoteExtensionChanged;        wm.Connect();    wm.SetReportType(InputReport.IRAccel, true);}