C# Signature:
/// <summary>
/// Function to retrieve raw input data.
/// </summary>
/// <param name="hRawInput">Handle to the raw input.</param>
/// <param name="uiCommand">Command to issue when retrieving data.</param>
/// <param name="pData">Raw input data.</param>
/// <param name="pcbSize">Number of bytes in the array.</param>
/// <param name="cbSizeHeader">Size of the header.</param>
/// <returns>0 if successful if pData is null, otherwise number of bytes if pData is not null.</returns>
[DllImport("user32.dll")]
public static extern int GetRawInputData(IntPtr hRawInput, RawInputCommand uiCommand, out RAWINPUT pData, ref int pcbSize, int cbSizeHeader);
or
/// <summary>
/// Function to retrieve raw input data.
/// </summary>
/// <param name="hRawInput">Handle to the raw input.</param>
/// <param name="uiCommand">Command to issue when retrieving data.</param>
/// <param name="pData">Raw input data.</param>
/// <param name="pcbSize">Number of bytes in the array.</param>
/// <param name="cbSizeHeader">Size of the header.</param>
/// <returns>0 if successful if pData is null, otherwise number of bytes if pData is not null.</returns>
[DllImport("user32.dll")]
public static extern int GetRawInputData(IntPtr hRawInput, RawInputCommand uiCommand, byte[] pData, ref int pcbSize, int cbSizeHeader);
VB Signature:
Declare Function GetRawInputData Lib "user32.dll" (TODO) As TODO
User-Defined Types:
/// <summary>
/// Enumeration containing the type device the raw input is coming from.
/// </summary>
public enum RawInputType
{
/// <summary>
/// Mouse input.
/// </summary>
Mouse = 0,
/// <summary>
/// Keyboard input.
/// </summary>
Keyboard = 1,
/// <summary>
/// Another device that is not the keyboard or the mouse.
/// </summary>
HID = 2
}
/// <summary>
/// Enumeration containing the flags for raw mouse data.
/// </summary>
[Flags()]
public enum RawMouseFlags
: ushort
{
/// <summary>Relative to the last position.</summary>
MoveRelative = 0,
/// <summary>Absolute positioning.</summary>
MoveAbsolute = 1,
/// <summary>Coordinate data is mapped to a virtual desktop.</summary>
VirtualDesktop = 2,
/// <summary>Attributes for the mouse have changed.</summary>
AttributesChanged = 4
}
/// <summary>
/// Enumeration containing the button data for raw mouse input.
/// </summary>
[Flags()]
public enum RawMouseButtons
: ushort
{
/// <summary>No button.</summary>
None = 0,
/// <summary>Left (button 1) down.</summary>
LeftDown = 0x0001,
/// <summary>Left (button 1) up.</summary>
LeftUp = 0x0002,
/// <summary>Right (button 2) down.</summary>
RightDown = 0x0004,
/// <summary>Right (button 2) up.</summary>
RightUp = 0x0008,
/// <summary>Middle (button 3) down.</summary>
MiddleDown = 0x0010,
/// <summary>Middle (button 3) up.</summary>
MiddleUp = 0x0020,
/// <summary>Button 4 down.</summary>
Button4Down = 0x0040,
/// <summary>Button 4 up.</summary>
Button4Up = 0x0080,
/// <summary>Button 5 down.</summary>
Button5Down = 0x0100,
/// <summary>Button 5 up.</summary>
Button5Up = 0x0200,
/// <summary>Mouse wheel moved.</summary>
MouseWheel = 0x0400
}
/// <summary>
/// Enumeration containing flags for raw keyboard input.
/// </summary>
[Flags()]
public enum RawKeyboardFlags
: ushort
{
/// <summary></summary>
KeyMake = 0,
/// <summary></summary>
KeyBreak = 1,
/// <summary></summary>
KeyE0 = 2,
/// <summary></summary>
KeyE1 = 4,
/// <summary></summary>
TerminalServerSetLED = 8,
/// <summary></summary>
TerminalServerShadow = 0x10
}
/// <summary>
/// Enumeration contanining the command types to issue.
/// </summary>
public enum RawInputCommand
{
/// <summary>
/// Get input data.
/// </summary>
Input = 0x10000003,
/// <summary>
/// Get header data.
/// </summary>
Header = 0x10000005
}
/// <summary>
/// Value type for a raw input header.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct RAWINPUTHEADER
{
/// <summary>Type of device the input is coming from.</summary>
public RawInputType Type;
/// <summary>Size of the packet of data.</summary>
public int Size;
/// <summary>Handle to the device sending the data.</summary>
public IntPtr Device;
/// <summary>wParam from the window message.</summary>
public IntPtr wParam;
}
/// <summary>
/// Value type for raw input from a mouse.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct RAWINPUTMOUSE
{
/// <summary>Flags for the event.</summary>
public RawMouseFlags Flags;
/// <summary>If the mouse wheel is moved, this will contain the delta amount.</summary>
public ushort ButtonData;
/// <summary>Flags for the event.</summary>
public RawMouseButtons ButtonFlags;
/// <summary>Raw button data.</summary>
public uint RawButtons;
/// <summary>Relative direction of motion, depending on flags.</summary>
public int LastX;
/// <summary>Relative direction of motion, depending on flags.</summary>
public int LastY;
/// <summary>Extra information.</summary>
public uint ExtraInformation;
}
/// <summary>
/// Value type for raw input from a keyboard.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct RAWINPUTKEYBOARD
{
/// <summary>Scan code for key depression.</summary>
public short MakeCode;
/// <summary>Scan code information.</summary>
public RawKeyboardFlags Flags;
/// <summary>Reserved.</summary>
public short Reserved;
/// <summary>Virtual key code.</summary>
public VirtualKeys VirtualKey;
/// <summary>Corresponding window message.</summary>
public WindowMessages Message;
/// <summary>Extra information.</summary>
public int ExtraInformation;
}
/// <summary>
/// Value type for raw input from a HID.
/// </summary>
[StructLayout(LayoutKind.Sequential)]
public struct RAWINPUTHID
{
/// <summary>Size of the HID data in bytes.</summary>
public int Size;
/// <summary>Number of HID in Data.</summary>
public int Count;
/// <summary>Data for the HID.</summary>
public IntPtr Data;
}
/// <summary>
/// Value type for raw input.
/// </summary>
[StructLayout(LayoutKind.Explicit)]
public struct RAWINPUT
{
/// <summary>Header for the data.</summary>
[FieldOffset(0)]
public RAWINPUTHEADER Header;
/// <summary>Mouse raw input data.</summary>
[FieldOffset(16)]
public RAWINPUTMOUSE Mouse;
/// <summary>Keyboard raw input data.</summary>
[FieldOffset(16)]
public RAWINPUTKEYBOARD Keyboard;
/// <summary>HID raw input data.</summary>
[FieldOffset(16)]
public RAWINPUTHID HID;
}
Alternative Managed API:
Do you know one? Please contribute it!
Notes:
The VirtualKeys enumeration has been omitted as it's quite lengthy. They're just mapped to the VK_* constants.
Tips & Tricks:
Please add some!
Sample Code:
protected override void WndProc(ref Message m)
{
if (m.Msg == (int)WindowMessages.RawInput) // WindowMessages.RawInput = 0x00FF (WM_INPUT)
{
RAWINPUT input = new RAWINPUT();
int outSize = 0;
int size = Marshal.SizeOf(typeof(RAWINPUT));
outSize = Win32API.GetRawInputData(m.LParam, RawInputCommand.Input, out input, ref size, Marshal.SizeOf(typeof(RAWINPUTHEADER)));
if (outSize != -1)
{
if (input.Header.Type == RawInputType.Mouse)
{
p.X += input.Mouse.LastX;
p.Y += input.Mouse.LastY;
label1.Text = "Mouse: " + p.X.ToString() + "x" + p.Y.ToString() + " " + input.Mouse.ButtonFlags.ToString();
}
}
}
base.WndProc(ref m);
}
