How to pass Object from C++ to JavaScript and vice-versa(Hybrid Plug-In)

I recently changed the id prefix of my plugin to the one I requested from adobe.
I also required Script ID/Name Registration because I was using e_Speak and p_said.
after this change I get the following warning

So changing PrefixId of my Plug-In and e_Speak, p_Said I generated this error.

would you know how to fix it.

P.S. I'm using the correct SDK for the correct version of InDesign so that's not the problem

Hi Dirk,

Thank you for your answer, can you link some example of how can i do that, because I've been trying for a long time, but I never understand how it works, nowadays I've only see a simple example in the SDK :

Javascript

var said = "hello";
    app.speak(said);
    var yourresponse = app.response;
    app.speak(yourresponse);

C++

ProjectNameScriptProvider.cpp

ErrorCode SCScriptProvider::HandleMethod(ScriptID methodID, IScriptRequestData* data, IScript* parent)
{
	ErrorCode status = kFailure;

	switch (methodID.Get())
	{
	case e_Speak:
		status = Speak(data, parent);
		break;

	default:
		status = CScriptProvider::HandleMethod(methodID, data, parent);
	}

    return status;
}

/* AccessProperty
*/
ErrorCode SCScriptProvider::AccessProperty(ScriptID propID, IScriptRequestData* data, IScript* parent)
{
	ErrorCode status = kFailure;

	switch (propID.Get())
	{
	case p_Response:
		status = AccessResponse(propID, data, parent);
		break;

    default:
		status = CScriptProvider::AccessProperty(propID, data, parent);
    }

    return status;
}

/* Speak
*/
ErrorCode SCScriptProvider::Speak(IScriptRequestData* data, IScript* parent)
{
	ErrorCode status = kFailure;

	ScriptData scriptData;
	status = data->ExtractRequestData(p_Said, scriptData);
	if (status == kSuccess)
	{
		PMString said;
		status = scriptData.GetPMString(said);
		said.SetTranslatable(kFalse);
		CAlert::InformationAlert(said);
	}

	return status;
}

/* AccessResponse
*/
ErrorCode SCScriptProvider::AccessResponse(ScriptID propID, IScriptRequestData* data, IScript* parent)
{
	ErrorCode status = kFailure;
	if (data->IsPropertyGet())
	{
		ScriptData scriptData;
		scriptData.SetWideString(WideString("Hello from CPP!"));
		data->AppendReturnData( parent, propID, scriptData ) ;
		status = kSuccess;
	}

	return status;
}

ProjectName.fr

resource VersionedScriptElementInfo(2)
{
	// Contexts
	{
        kFiredrakeScriptVersion, kCoreScriptManagerBoss, kInDesignAllLanguagesFS, k_Wild,
		kFiredrakeScriptVersion, kCoreScriptManagerBoss, kInCopyAllLanguagesFS, k_Wild,
	}
	
	// Elements
	{
		// Specifies a scripting API method called 'speak' 
		Method
		{
			kSCMethodScriptElement,
			e_Speak,
			"speak",
			"Displays what you say in dialog",
			VoidType,
			{
				p_Said, "said", "Holds a string", StringType, kRequired,
			}
		}

		// Specifies a property called 'response'
		Property
		{
			kSCPropertyScriptElement,
			p_Response,
			"response",
			"Describes user response to dialog",
			StringType,
			{}
			kNoAttributeClass,
		}
		
		// Connects this plug-in's methods and properties to scripting.
		Provider
		{
			kSCScriptProviderBoss,	// provider boss ID
			{
				Object{ kApplicationObjectScriptElement },
				Method{ kSCMethodScriptElement },
				Property{ kSCPropertyScriptElement, kReadOnly },
			}
		}
	}
};

I think this is the way to pass objects between C++ and javascirpt, but I don't understand how exactly it works, if I had to pass other objects than a simple PMString I would not know how to do it, for example if I wanted to pass an XML object, an image or a page how i should do?

- Stefano