EntryPointNotFoundException, when trying to import DLL. Help please :)

Hi all, I’m having some errors with a DLL I created but I don’t know why…

This is the error:

EntryPointNotFoundException: text2Speech
TTSFestival.OnMouseUp () (at Assets/Scripts/TTSFestival.cs:20)

This my script:

using UnityEngine;
using System;
using System.Collections;
using System.Runtime.InteropServices;

public class TTSFestival : MonoBehaviour 
	//[DllImport ("TTSPlugin", EntryPoint="text2Speech")] private static extern int    text2Speech(string message, string voice);
	[DllImport ("TTSPlugin")]	private static extern void text2Speech(string message, string voice);

	public string voice = "english"; 
	public string message ="Text";

	void OnMouseUp () {
		text2Speech(message, voice);

And this my DLL code:

#if _MSC_VER // this is defined when compiling with Visual Studio
#define EXPORT_API __declspec(dllexport) // Visual Studio needs annotating exported functions with this
#define EXPORT_API // XCode does not need annotating exported functions, so define is empty

// ------------------------------------------------------------------------
// Plugin itself

#include <sstream>
#include <string>

// Link following functions C-style (required for plugins)
extern "C"
	void EXPORT_API text2Speech(std::string message, std::string voice)
		std::stringstream commandoss;
		std::string commandos,msg;
		commandoss << "start /B festival.exe --libdir \"festival/lib\" "; 
		commandoss << voice;
		commandoss << " -A -T \"";
		//std::replace_if(msg.begin(),msg.end(),boost::is_any_of("\""),', ');
		commandoss << msg;
		commandoss << "\"";
		commandos = commandoss.str();

} // end of export C block

Any kind of help is welcomed :))

You’ll probably need const char* instead of std::string for the message and voice parameters in the native code