@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The GetRawInputDeviceInfo function gets information about the raw input device. !!!!C# Signature: //This is generic but tricky to use [DllImport("user32.dll", SetLastError=true)] static extern uint GetRawInputDeviceInfo(IntPtr hDevice, uint uiCommand, IntPtr pData, ref uint pcbSize); //Call this passing RIDI_DEVICEINFO [DllImport("user32.dll", SetLastError = true, EntryPoint = "GetRawInputDeviceInfoA")] public static extern uint GetRawInputDeviceInfo(IntPtr hDevice, uint uiCommand, ref RID_DEVICE_INFO pData, ref uint pcbSize); //Call this passing RIDI_DEVICENAME [DllImport("user32.dll", SetLastError = true, EntryPoint = "GetRawInputDeviceInfoA", CharSet = CharSet.Ansi)] public static extern uint GetRawInputDeviceInfo(IntPtr hDevice, uint uiCommand, StringBuilder pData, ref uint pcbSize); !!!!C# User-Defined Types: [StructLayout(LayoutKind.Sequential)] internal struct RID_DEVICE_INFO_HID { [MarshalAs(UnmanagedType.U4)] public int dwVendorId; [MarshalAs(UnmanagedType.U4)] public int dwProductId; [MarshalAs(UnmanagedType.U4)] public int dwVersionNumber; [MarshalAs(UnmanagedType.U2)] public ushort usUsagePage; [MarshalAs(UnmanagedType.U2)] public ushort usUsage; } [StructLayout(LayoutKind.Sequential)] internal struct RID_DEVICE_INFO_KEYBOARD { [MarshalAs(UnmanagedType.U4)] public int dwType; [MarshalAs(UnmanagedType.U4)] public int dwSubType; [MarshalAs(UnmanagedType.U4)] public int dwKeyboardMode; [MarshalAs(UnmanagedType.U4)] public int dwNumberOfFunctionKeys; [MarshalAs(UnmanagedType.U4)] public int dwNumberOfIndicators; [MarshalAs(UnmanagedType.U4)] public int dwNumberOfKeysTotal; } [StructLayout(LayoutKind.Sequential)] internal struct RID_DEVICE_INFO_MOUSE { [MarshalAs(UnmanagedType.U4)] public int dwId; [MarshalAs(UnmanagedType.U4)] public int dwNumberOfButtons; [MarshalAs(UnmanagedType.U4)] public int dwSampleRate; [MarshalAs(UnmanagedType.U4)] public int fHasHorizontalWheel; } [StructLayout(LayoutKind.Explicit)] internal struct RID_DEVICE_INFO { [FieldOffset(0)] public int cbSize; [FieldOffset(4)] public int dwType; [FieldOffset(8)] public RID_DEVICE_INFO_MOUSE mouse; [FieldOffset(8)] public RID_DEVICE_INFO_KEYBOARD keyboard; [FieldOffset(8)] public RID_DEVICE_INFO_HID hid; } internal enum DeviceInfoTypes { RIDI_PREPARSEDDATA = 0x20000005, RIDI_DEVICENAME = 0x20000007, RIDI_DEVICEINFO = 0x2000000B } !!!!VB Signature: Declare Function GetRawInputDeviceInfo Lib "user32.dll" Alias "GetRawInputDeviceInfoW" (ByVal hDevice As IntPtr, ByVal uiCommand As DeviceInfoTypes, ByVal pData As IntPtr, ByRef pcbSize As UInteger) As Integer !!!!VB User-Defined Types: Public Enum DeviceInfoTypes As UInteger RIDI_PREPARSEDDATA = &H20000005 RIDI_DEVICENAME = &H20000007 RIDI_DEVICEINFO = &H2000000B End Enum !!!!Alternative Managed API: Do you know one? Please contribute it! !!!!Notes: * Contrary to what is said in official documentation, you should set pcbSize parameter to capacity of the buffer before the call. !!!!Tips & Tricks: Please add some! !!!!Sample Code C#: ```csharp var deviceHandle = ti.hSource; // a handle obtained from WM_TOUCH message. if (devBufer == null) devBufer = new StringBuilder(4096 * 2); devBufer.Clear(); uint returnedDataSize = (uint)devBufer.Capacity; var firstCall = GetRawInputDeviceInfo(deviceHandle, RIDI_DEVICENAME, devBufer, ref returnedDataSize); var firstError = Marshal.GetLastWin32Error(); var firtsDataSize = returnedDataSize; var devName = devBufer.ToString(); if (string.IsNullOrEmpty(devName)) devName = "No name retrieved"; var devInfo = new RID_DEVICE_INFO(); var structureSize = Convert.ToUInt32(Marshal.SizeOf<RID_DEVICE_INFO>()); devInfo.cbSize = structureSize; returnedDataSize = structureSize; var secondCall = GetRawInputDeviceInfo(deviceHandle, RIDI_DEVICEINFO, ref devInfo, ref returnedDataSize); var secondError = Marshal.GetLastWin32Error(); string hidData = "ERROR: hid data retrieval failed"; if (devInfo.dwType == 2) { hidData = devInfo.hid.ToString(); } Debug.LogWarning($"New touch device detected with name '{devName}' and handle '{ti.hSource}'. " + $"\nWinapi calls returned '{(int)firstCall}' per name and '{(int)secondCall}' per data " + $"\nError codes were '{firstError}' per name and '{secondError}' per data" + $"\nData sizes were '{firtsDataSize}' per name and '{returnedDataSize}' per data" + $"\nHid data structure size: '{structureSize}'; Structure type is '{devInfo.dwType}'" + $"\nHid data: {hidData}"); ``` !!!!Sample Code VB: ' Enumerating devices with a known VID ' First half heavily borrowed from C# example on GetRawInputDeviceList() Sub GetAllRawDeviceVID() Dim deviceCount As UInt32 = 0 Dim dwSize As Integer = CInt(Marshal.SizeOf(GetType(RAWINPUTDEVICELIST))) Dim retValue As UInt32 = GetRawInputDeviceList(IntPtr.Zero, deviceCount, dwSize) If retValue <> 0 Then Exit Sub ' handle this Dim devPtr As IntPtr = Marshal.AllocHGlobal(CType(dwSize * deviceCount, Integer)) retValue = GetRawInputDeviceList(devPtr, deviceCount, dwSize) Dim deviceList As RAWINPUTDEVICELIST Dim rawDevs As New Dictionary(Of IntPtr, RawInputDeviceType) For i As Integer = 0 To (deviceCount - 1) deviceList = CType(Marshal.PtrToStructure(New IntPtr((devPtr.ToInt32() + (dwSize * i))), GetType(RAWINPUTDEVICELIST)), RAWINPUTDEVICELIST) If deviceList.dwType = RawInputDeviceType.KEYBOARD Then rawDevs.Add(deviceList.hDevice, deviceList.dwType) End If Next Dim pcbSize As UInt32 = 0 Dim deviceName As String = String.Empty Dim lstHDevices As New List(Of String) For Each itm As KeyValuePair(Of IntPtr, RawInputDeviceType) In rawDevs GetRawInputDeviceInfo(itm.Key, DeviceInfoTypes.RIDI_DEVICENAME, IntPtr.Zero, pcbSize) Dim pData As IntPtr = Marshal.AllocHGlobal(CType(pcbSize, Integer)) GetRawInputDeviceInfo(itm.Key, DeviceInfoTypes.RIDI_DEVICENAME, pData, pcbSize) deviceName = Marshal.PtrToStringAuto(pData) If deviceName.Contains("VID_05FE") Then lstHDevices.Add(deviceName) Next ' do something End Sub Documentation: GetRawInputDeviceInfo@msdn on MSDN
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