How to Read and Write Text Files Using the C++ SDK

I tried various approaches.

// We cannot be held responsible for any problems that may occur.
// Please try it at your own risk.
do
{
	IDFile iDFile;
	// AppLocalCachedDataFolder
	if (FileUtils::GetAppLocalCachedDataFolder(
		&iDFile, PMString("MyPlugInCache.txt")) == kFalse) break;

	// Write
	InterfacePtr<IPMStream> iPMStream(StreamUtil::CreateFileStreamWrite(iDFile, kOpenOut | kOpenTrunc));

	// Read
	//InterfacePtr<IPMStream> iPMStream(StreamUtil::CreateFileStreamRead(iDFile));

	if (iPMStream == nil) break;

	std::vector<ActionID> vector_actionID;
	int32 int32_size = 0;
	if (iPMStream->IsWriting()) // Write
	{
		vector_actionID.push_back(273);
		vector_actionID.push_back(271);

		// Size must be specified
		for (ActionID actionID : vector_actionID)
		{
			int32_size++;
		}

		// Write size
		iPMStream->XferInt32(int32_size);

		// Write actionID
		for (ActionID actionID : vector_actionID)
		{
			iPMStream->XferID(actionID);
		}
	}
	else if (iPMStream->IsReading()) // Read
	{
		// Query size
		iPMStream->XferInt32(int32_size);

		// Read actionID
		for (int32 i = 0; i < int32_size; i++)
		{
			ActionID actionID;
			iPMStream->XferID(actionID);
			vector_actionID.push_back(actionID);
		}
	}

	// Check
	if (iPMStream->IsReading())
	{
		for (ActionID actionID : vector_actionID)
		{
			PMString num;
			num.AsNumber(actionID.Get());
			CAlert::InformationAlert(num);
		}
	}

	// Close
	iPMStream->Flush();
	iPMStream->Close();

	// Open folder
	InterfacePtr<IScriptManager> iScriptManager(
		Utils<IScriptUtils>()->QueryScriptManager(kJavaScriptMgrBoss)
	);
	if (iScriptManager == nil) break;

	InterfacePtr<IScriptEngine> iScriptEngine(
		iScriptManager->QueryDefaultEngine()
	);
	if (iScriptEngine == nil) break;

	InterfacePtr<IScriptRunner> iScriptRunner(iScriptEngine, UseDefaultIID());
	if (iScriptRunner == nil) break;

	PMString pMString_path;
	FileUtils::GetPathOnly(iDFile, pMString_path);

	RunScriptParams runScriptParams(iScriptRunner);
	ErrorCode errorCode = iScriptRunner->RunScript(
		"Folder(\""+ FileUtils::PMStringToFileURL(pMString_path) + "\").execute();"
		, runScriptParams
	);

} while (false);

I'm starting to think it might be easier to run the script from the C++ SDK and save it that way.