System.Runtime.InteropServices by Microsoft

NuGet / site data
Details
How to use
- Example (source csproj, source files)
- Generated Files
Useful

NuGet / site data

Details

Info

info

Name: System.Runtime.InteropServices

Provides types that support COM interop and platform invoke services.

Commonly Used Types: System.Runtime.InteropServices.GCHandle System.Runtime.InteropServices.GuidAttribute System.Runtime.InteropServices.COMException System.DllNotFoundException System.Runtime.InteropServices.DllImportAttribute

Author: Microsoft

NuGet: https://www.nuget.org/packages/System.Runtime.InteropServices/

You can find more details at https://learn.microsoft.com/en-us/dotnet/standard/native-interop/pinvoke-source-generation

Source: https://www.nuget.org/packages/System.Runtime.InteropServices/

Original Readme

note

About

note

Generate PInvoke calls

How to use

Example (source csproj, source files)

CSharp Project
Program.cs
DemoMsgBox.cs
globals.cs

This is the CSharp Project that references System.Runtime.InteropServices

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net7.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>
	<PropertyGroup>
		<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
		<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
	</PropertyGroup>
</Project>

This is the use of System.Runtime.InteropServices in Program.cs

WriteLine(MessageBoxW(IntPtr.Zero, "asd", "asd", 1));
//RSCG
WriteLine(MessageBoxW_LI(IntPtr.Zero, "asd", "asd", 1));

This is the use of System.Runtime.InteropServices in DemoMsgBox.cs

partial class DemoImport
{
    [DllImport("user32.dll", EntryPoint = "MessageBoxW", CharSet = CharSet.Unicode, SetLastError = true)]

    internal static extern int MessageBoxW(IntPtr hWnd, string lpText, string lpCaption, uint uType);


    [LibraryImport("user32.dll", EntryPoint = "MessageBoxW", SetLastError = true,
StringMarshalling = StringMarshalling.Utf16)]

    internal static partial int MessageBoxW_LI(IntPtr hWnd, string lpText, string lpCaption, uint uType);
}

This is the use of System.Runtime.InteropServices in globals.cs

global using static System.Console;
global using static DemoImport;
global using System.Runtime.InteropServices;

Generated Files

Those are taken from $(BaseIntermediateOutputPath)\GX

LibraryImports.g.cs

// <auto-generated/>
unsafe partial class DemoImport
{
    [System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "7.0.10.26716")]
    [System.Runtime.CompilerServices.SkipLocalsInitAttribute]
    internal static partial int MessageBoxW_LI(nint hWnd, string lpText, string lpCaption, uint uType)
    {
        int __lastError;
        int __retVal;
        // Pin - Pin data in preparation for calling the P/Invoke.
        fixed (void* __lpText_native = &global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.GetPinnableReference(lpText))
        fixed (void* __lpCaption_native = &global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.GetPinnableReference(lpCaption))
        {
            System.Runtime.InteropServices.Marshal.SetLastSystemError(0);
            __retVal = __PInvoke(hWnd, (ushort*)__lpText_native, (ushort*)__lpCaption_native, uType);
            __lastError = System.Runtime.InteropServices.Marshal.GetLastSystemError();
        }

        System.Runtime.InteropServices.Marshal.SetLastPInvokeError(__lastError);
        return __retVal;
        // Local P/Invoke
        [System.Runtime.InteropServices.DllImportAttribute("user32.dll", EntryPoint = "MessageBoxW", ExactSpelling = true)]
        static extern unsafe int __PInvoke(nint hWnd, ushort* lpText, ushort* lpCaption, uint uType);
    }
}