Comments (4)
Will you share your code? I have run this under 32 and 64-bit, with Unicode character sets without problem.
uint nDev = 0;
Assert.That(GetRawInputDeviceList(null, ref nDev, (uint)Marshal.SizeOf(typeof(RAWINPUTDEVICELIST))), ResultIs.Not.Value(uint.MaxValue));
Assert.That(nDev, Is.GreaterThan(0));
RAWINPUTDEVICELIST[] devs = new RAWINPUTDEVICELIST[(int)nDev];
Assert.That(nDev = GetRawInputDeviceList(devs, ref nDev, (uint)Marshal.SizeOf(typeof(RAWINPUTDEVICELIST))), ResultIs.Not.Value(uint.MaxValue));
Assert.That(nDev, Is.GreaterThan(0));
for (int i = 0; i < nDev; i++)
{
uint sz = 0;
Assert.That(GetRawInputDeviceInfo(devs[i].hDevice, RIDI.RIDI_DEVICENAME, default, ref sz), ResultIs.Value(0));
SafeLPTSTR data = new((int)sz + 1);
Assert.That(GetRawInputDeviceInfo(devs[i].hDevice, RIDI.RIDI_DEVICENAME, data, ref sz), Is.GreaterThan(0));
TestContext.WriteLine($"{data}");
}
from vanara.
Sample codes here:
.csproj
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net8.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Vanara.PInvoke.Kernel32" Version="3.4.17" />
<PackageReference Include="Vanara.PInvoke.User32" Version="3.4.17" />
</ItemGroup>
</Project>
Program.cs
using System.Runtime.InteropServices;
using Vanara.PInvoke;
namespace ConsoleUser32;
internal class Program
{
static void Main()
{
EnumerateDevices();
}
internal static void EnumerateDevices()
{
uint deviceCount = 0;
int dwSize = Marshal.SizeOf(typeof(RawInputDeviceList));
if (User32.GetRawInputDeviceList(null, ref deviceCount, (uint)dwSize) == 0)
{
User32.RAWINPUTDEVICELIST[] pRawInputDeviceList = new User32.RAWINPUTDEVICELIST[deviceCount];
User32.GetRawInputDeviceList(pRawInputDeviceList, ref deviceCount, (uint)dwSize);
for (int i = 0; i < deviceCount; i++)
{
uint pcbSize = 0;
User32.RAWINPUTDEVICELIST rid = pRawInputDeviceList[i];
User32.GetRawInputDeviceInfo(rid.hDevice, (uint)RawInputDeviceInfo.RIDI_DEVICENAME, IntPtr.Zero, ref pcbSize);
if (pcbSize <= 0) continue;
// --------------------------------------
// All right
//nint pDataX = Marshal.AllocHGlobal((int)pcbSize);
//User32X.GetRawInputDeviceInfo((nint)rid.hDevice, RawInputDeviceInfo.RIDI_DEVICENAME, pDataX, ref pcbSize);
//string? deviceNameX = Marshal.PtrToStringAnsi(pDataX);
//Console.WriteLine(deviceNameX);
//Marshal.FreeHGlobal(pDataX);
// --------------------------------------
// --------------------------------------
// Application crash
nint pData = Marshal.AllocHGlobal((int)pcbSize);
User32.GetRawInputDeviceInfo(rid.hDevice, (uint)RawInputDeviceInfo.RIDI_DEVICENAME, pData, ref pcbSize);
string? deviceName = Marshal.PtrToStringAuto(pData);
Console.WriteLine(deviceName);
Marshal.FreeHGlobal(pData);
// --------------------------------------
}
}
}
}
file static class User32X
{
[DllImport("User32.dll", SetLastError = true)]
public static extern uint GetRawInputDeviceInfo(nint hDevice, RawInputDeviceInfo command, nint pData, ref uint size);
}
[StructLayout(LayoutKind.Sequential)]
file struct RawInputDeviceList
{
public nint Device;
public uint Type;
}
file enum RawInputDeviceInfo : uint
{
RIDI_DEVICENAME = 0x20000007,
RIDI_DEVICEINFO = 0x2000000b,
PREPARSEDDATA = 0x20000005
}
from vanara.
You have a small bug in the code due to an odd use by the API of a variable. The docs say:
For this (RIDI_DEVICENAME) uiCommand only, the value in pcbSize is the character count (not the byte count).
When calling Marshal.AllocHGlobal
with the resulting value from the first call, you need to adjust for character size. This could be done by multiplying pData
by Marshal.SystemDefaultCharSize
or by using the SafeLPTSTR
class in my sample code above. The DllImport
statement then still accounts for the API having both an Ansi and a Unicode implementation.
from vanara.
I ajust to nint pData = Marshal.AllocHGlobal((int)pcbSize * Marshal.SystemDefaultCharSize);
and it works.
Thank you
from vanara.
Related Issues (20)
- How to use native Win32 Shell ImageList in WinUI3 - Implementing ExplorerBrowser for WinUI3 HOT 17
- Missing unions in FwpUClnt FWPM_* structures HOT 1
- PInvoke.IpHlpApi.GetExtendedUdpTable give wrong port HOT 3
- WTSApi32: Wrong variable used to create dateTime HOT 1
- Wrong Marsha.SizeOf for MODULEENTRY32 HOT 2
- Wrong values in Kernel32.READ_DIRECTORY_NOTIFY_INFORMATION_CLASS enum HOT 1
- SearchApi.IQuerySolution.Resolve() should not require unsafe pointer for parameter "SYSTEMTIME* pstReferenceTime" HOT 7
- Wrong layout of Shell32.STRRET structure in x64 process HOT 1
- False-positive `IsNullOrEmpty` on `StrPtrAuto` HOT 1
- Wrong marshalling for pszVerb in Shell32.IFolderView2.InvokeVerbOnSelection() HOT 1
- The file generated by ShellLink.Create() is not a shortcut file. HOT 1
- Dotnet 5 Error HOT 7
- SafeHANDLE != operator should make parameters nullable HOT 3
- WinINet.InternetSetOption seems breaking change in 4.0.0 HOT 1
- CRYPT_PROVIDER_DATA duplicates CRYPT_PROVUI_DATA HOT 1
- System.TypeInitializationException: The type initializer for '<Module>' threw an exception. HOT 1
- DOSvc unit test fails with 0x80010123 HOT 2
- Unable to create TXT records HOT 3
- ErrorHelper.GetErrorMessage throws System.OverflowException HOT 1
- ContextMenu related problems HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from vanara.