How do I tell CsWin32 to generate a HResult style function.

[Gavin Williams (Gavin-Williams)]

I'm trying to generate a HResult style version of GameInput.GetCurrentReading(), similar to the original signature. I need this because CsWin32 is generating a function that throws ComExceptions, and GameInput seems to be designed to fail for a while - maybe until it can connect devices internally.

This is as far as I have gotten, and this is already at the end of a chain of failed suggestions by copilot...

{
  "$schema": "https://aka.ms/CsWin32.schema.json",
  "public": true,
  "generatorOptions": {
    "PreserveSigMethods": [ "IGameInput::GetCurrentReading", "GetCurrentReading" ]
  }
}

Here's another suggestion...

{
  "$schema": "https://microsoft.github.io/CsWin32/schemas/1.0/NativeMethods.json",
  "generatorOptions": {
    "preserveSigMethods": true
  },
  "include": [
    "IGameInput::GetCurrentReading" ]
}

But I don't know how to deal with the schema part, there are two different schema.

[Gavin Williams (Gavin-Williams)]

What about this CsWin32.json file...

{
  "$schema": "https://aka.ms/CsWin32.schema.json",
  "public": true,
  "comInterop": {
    "preserveSigMethods": [
      "GetCurrentReading"
    ]
  }
}

or this

{
  "$schema": "https://aka.ms/CsWin32.schema.json",
  "className": "PInvoke",
  "public": true,
  "comInterop": {
    "preserveSigMethods": [
      "GetCurrentReading"
    ]
  }
}

This doesn't show any errors but it also doesn't work.

[Gavin Williams (Gavin-Williams)]

I had to include the class/interface name, which seems to differ from examples. So, no idea what's going on there. But this does generate the HResult style function

{
  "$schema": "https://aka.ms/CsWin32.schema.json",
  "comInterop": {
    "preserveSigMethods": [
      "IGameInput.GetCurrentReading"
    ]
  }
}