C/C++ Custom Actions

[Biye123]

I've been trying to add a DLL call to WiX4 and I've tried several implementations with no luck.

1. C DLL using another compiler

Implementation is basically

UINT __stdcall Fn (MSIHANDLE hInstall)
{
    // Message Popup
    return 0;
}

2. C/C++ DLL using Visual Studio

Same implementation as above, except with and without extern "C"

3. C++ Custom Action template with WiX 4

The project does not even compile because it's complaining that it can't find wcautil.h even though it is present from the nuget packages. I tried restoring NuGet but it says there's no issues.

4. C# Custom Action template with WiX 4

Managed to get this to work, but would preferably use c/c++ or at least have the option of them moving forward.

Both 1 and 2 returns some invalid DLL call error (1157) in the logs. All cases uses the same implementation within the wxs script. Given that the C# dll managed to work without any issues, I don't think it has anything to do with the wxs syntax.