I tried DigitizerExample. It only lists two finger contact even if I used more than two fingers on the screen. (I'm trying on a device which is equipped with multi-touch (upto 10 fingers) and pen capability. Would this be a bug? Is there a chance to fix this?
Best Regards,

hi,mfcorlib
i was puzzled to call your dll , can you git a demo to call this dll. Thank you very much

I modified the sample to receive mouse event also

 class Program
    {
        static void Main()
        {
            // Get the devices that can be handled with Raw Input.
            var devices = RawInputDevice.GetDevices();

            // Keyboards will be returned as a RawInputKeyboard.
            var keyboards = devices.OfType<RawInputKeyboard>();

            // List them up.
            foreach (var device in keyboards)
                Console.WriteLine($"{device.DeviceType} {device.VendorId:X4}:{device.ProductId:X4} {device.ProductName}, {device.ManufacturerName}");

            // Mice will be RawInputMouse.
            var mice = devices.OfType<RawInputMouse>();
            foreach (var mouse in mice)
                Console.WriteLine($"{mouse.DeviceType} {mouse.VendorId:X4}:{mouse.ProductId:X4} {mouse.ProductName}, {mouse.ManufacturerName}");

            // To begin catching inputs, first make a window that listens WM_INPUT.
            var window = new RawInputReceiverWindow();

            window.Input += (sender, e) =>
            {
                // Catch your input here!
                var data = e.Data;

                Console.WriteLine(data);
            };

            try
            {
                // Register the HidUsageAndPage to watch any device.
                RawInputDevice.RegisterDevice(HidUsageAndPage.Keyboard, RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.NoLegacy, window.Handle);
                RawInputDevice.RegisterDevice(HidUsageAndPage.Mouse, RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.NoLegacy, window.Handle);

                Application.Run();
            }
            finally
            {
                RawInputDevice.UnregisterDevice(HidUsageAndPage.Keyboard);
                RawInputDevice.UnregisterDevice(HidUsageAndPage.Mouse);
            }
        }
    }

If i press the lbutton down repeatedly only first event is received. Rest of the LButton events are received after pressing any other keyboard key or rbutton. How can the subsequent lbutton keys be received immediately? All other keys work fine.

Thank you for great library! It is really useful to get inputs from HID devices.

I have tested it to parse inputs from Precision TouchPad (PTP) and encountered System.ArgumentException (HResult=0x80070057
Message=An item with the same key has already been added.) at RawInputDigitizerContact constructor when a window receives WM_INPUT message. They are fired at following two Enumerable.ToDictionary methods.

This exception is relatively common in Enumerable.ToDictionary method when there are duplicate keys. It is not difficult to avoid this exception and I will be happy to send PR to fix this issue.

Before start working, I would like to hear your view on this issue especially whether the first value or the last value is to be preserved. I have no strong view on this selection.

code link:

here's my test using this code:

        public override int GetHashCode()
        {
            var hashcode = typeof(HidUsageAndPage).GetHashCode() ^
UsagePage.GetHashCode() ^
Usage.GetHashCode();

            Debug.WriteLine($"UsagePage:{UsagePage}, Usage:{Usage}, HashCode:{hashcode}");

            return hashcode;
        }

the output (please check lines with arrow):

UsagePage:13, Usage:60, HashCode:30015907
UsagePage:13, Usage:69, HashCode:30015962
UsagePage:13, Usage:68, HashCode:30015963
UsagePage:13, Usage:66, HashCode:30015965
UsagePage:13, Usage:50, HashCode:30015917
UsagePage:1, Usage:49, HashCode:30015906   <----
UsagePage:1, Usage:48, HashCode:30015907
UsagePage:13, Usage:48, HashCode:30015919
UsagePage:13, Usage:62, HashCode:30015905
UsagePage:13, Usage:61, HashCode:30015906  <----
UsagePage:1, Usage:49, HashCode:30015906  <----
UsagePage:13, Usage:61, HashCode:30015906  <----

You can see diffent UsagePage and Usage returned same value.

if used with .net 4.6.2 , this lib install about 15 dependecy dll.

can you make nuget for .net 4.6.2 ?

Hi @mfakane, I'm trying to use your wrapper to receive raw input from game controllers. Here's an example controller I'm trying to read:

I've tried to modify SimpleExample to use either HidUsageAndPage.Joystick or HidUsageAndPage.Gamepad, but there is a Win32ErrorException. RegisterRawInputDevices returns false with GetLastError = 87, which is "The parameter is incorrect.".

I also tried to directly access it like this as well:

            try
            {
                // Register the HidUsageAndPage to watch any device.
                RawInputDevice.RegisterDevice(devices[0].UsageAndPage, RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.NoLegacy, window.Handle);

                Application.Run();
            }
            finally
            {
                RawInputDevice.UnregisterDevice(devices[0].UsageAndPage);
            }

I'm not sure if it's correct, but it returns the same error. What am I supposed to do?

i want to get HID-compliant mouse device position

for sepecific device ,

can i get keypress event , and block that device typing keystrokes on my forms . ?

i dont care if it writes to notepad/other external apps or not.

When running Multiplicity KVM software users are reporting crash:

Linearstar.Windows.RawInput.Native.Win32ErrorException: Invalid access to memory location.

   at Linearstar.Windows.RawInput.Native.User32.GetRawInputDataHeader(RawInputHandle rawInput)
   at Linearstar.Windows.RawInput.RawInputData.FromHandle(RawInputHandle rawInput)
   at livelywpf.Core.RawInputDX.Hook(IntPtr hwnd, Int32 msg, IntPtr wparam, IntPtr lparam, Boolean& handled)
   at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Reference: rocksdanister/lively#575

This means that the library doesn't inform the application that uses the library that the touching of a digitizer has finished.

Maybe all higher .NET Framework versions, for projects depending on those versions:
net462
net47
net471
net472
net48

Thank you @mfakane and I want to add some code to show how to do in wpf

Compiling the DLL and importing it into Unity works, and I can iterate through the devices and see them, but I am confused on how to catch the raw input inside Unity using this, as I don't think overriding WndProc inside Unity is possible (since it can't use Windows.Forms). Is there a way to get the raw input in Unity?

protected override void OnSourceInitialized(EventArgs e)
{
    var windowInteropHelper = new WindowInteropHelper(this);
    var hwnd = windowInteropHelper.Handle;
    var devices = RawInputDevice.GetDevices();

    RawInputDevice.RegisterDevice(HidUsageAndPage.TouchScreen,
        RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.DevNotify, hwnd);
    RawInputDevice.RegisterDevice(HidUsageAndPage.TouchPad,
        RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.DevNotify, hwnd);
    RawInputDevice.RegisterDevice(HidUsageAndPage.Pen,
        RawInputDeviceFlags.ExInputSink | RawInputDeviceFlags.DevNotify, hwnd);
    HwndSource source = HwndSource.FromHwnd(hwnd);
    source.AddHook(WndProc);
}

private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
    switch (msg)
    {
        case 0x00FF:
            {
                ProcessInputCommand(lParam);
                break;
            }
    }
    handled = false;
    return IntPtr.Zero;
}

Regardless of the triggering position, whenever focusing on the "Start Menu" in the system, the msg no longer receives the 0x00FF signal. Whether it's TouchScreen, TouchPad, or Pen, the issue persists. This has been bothering me for a long time. I would like to ask how to solve this problem, so that even when focusing on the "Start Menu" in the system, I can still receive the correct WM_INPUT signals. Thank you.

*My system is win11

Hi.

Great library, works really well. How would I go about globally hooking a key?

Joe

Here is a sample console output.Any idea why ?

Keyboard : 100
Vendor Id: 1118
Product Id: 1970
Keyboard : 100
Vendor Id: 1118
Product Id: 1970
Keyboard : 104
Vendor Id: 1118
Product Id: 1970
Keyboard : 104
Vendor Id: 1118
Product Id: 1970

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Hi,

I'm using your library to sniff barcodes from barcode reader. There is an option on barcode readers which you can change the language setting of the barcode reader.

When I read a barcode from my barcode scanner, normally it gets the right characters both rawinput and pc screen. Below image shows right scenario.

My problem is, if I change the language setting of my barcode scanner to Turkey, rawinput gets additional characters like below image.

Could you please help me about why this is happening?

RawInputDevice.GetDevices() InvalidDeviceId.

I have a WPF application that has one or more HID keyboard devices connected. Is there a way to register ONLY these devices (and not the regular keyboard) with RawInput? I see there is an UnregisterDevice method, but it only works for specific "types" of device; for example, I could call it like this:

RawInputDevice.UnregisterDevice(HidUsageAndPage.Keyboard);

Unfortunately, this unregisters ALL keyboard devices.

What I would like to do is loop through registered devices and Unregister those which are NOT of a specific (VendorId, ProductId). Better yet, I would like to get a list of HID devices and register ONLY devices with a specific (VendorId, ProductId).

Any ideas how I can accomplish this?

UvotGuy

Like the title says, if you have a RawKeyboardFlags variable and you use HasFlag(RawKeyboardFlags.Down) on it, it will always return true, this is due to RawKeyboardFlags.Down being 0 in the enum and the bitwise logic that goes into checking if it has the flag. In flag enums this should only ever be used as a flag "everything".

In my own code I temporarily use if (flags.Equals(RawKeyboardFlags.Down) || flags.Equals(RawKeyboardFlags.LeftKey));
But it should be fixed

can this work on .NET 4.5 ?