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getrawinputdeviceinfo (user32)
 
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Summary
The GetRawInputDeviceInfo function gets information about the raw input device.

C# Signature:

[DllImport("user32.dll", SetLastError=true)]
static extern uint GetRawInputDeviceInfo(IntPtr hDevice, uint uiCommand, IntPtr pData, ref uint pcbSize);

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:

None.

Tips & Tricks:

Please add some!

Sample Code:

    [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;
    }

Documentation

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