Will HostApplicationServices return the correct instance of AutoCAD?

[soonhui]

From the help it says that

The HostApplicationServices class provides various services to host applications at runtime. 

I guess that means that if I have multiple ACAD/C3D version installed, then the HostApplicationServices will return the registry key sets differently, depending on which version that is currently running? It does seem that way, but I need to be sure. 

[daniel_cadext]

I use it to load ARX modules in vanilla , hasn’t failed yet

    static void loadDBXModules()
    {
        const int version = acdbHostApplicationServices()->releaseMajorVersion();
        const auto acismobj = std::format(_T("acismobj{}.dbx"), version);
        const auto acMPolygonObj = std::format(_T("AcMPolygonObj{}.dbx"), version);
        if (const auto result = acrxLoadModule(acismobj.c_str(), false, false); !result)
            acutPrintf(_T("Failed to load %ls: "), acismobj.c_str());
        if (const auto result = acrxLoadModule(acMPolygonObj.c_str(), false, false); !result)
            acutPrintf(_T("Failed to load %ls: "), acMPolygonObj.c_str());
    }

[soonhui]

@daniel_cadext , but this is not .Net though. 

[ActivistInvestor · Accepted solution]

Yes, it returns the registry keys for the executing product. It doesn't know anything about any other installed products other than the one that is running. 

[daniel_cadext]

@soonhui .NET is a wrapper around ARX