C++ og C# DLL

Hejsa :)

Jeg er ved at skrive en "foreign routine" (C++ dll) til Saber Simulator.
Saber Simulator tager imod en C++ DLL hvis den har denne header:

extern "C" _declspec(dllexport) void X2_X3(
double* in,long* nin,double* ifl,long* nifl,double* out,
long* nout,double* ofl,long* nofl,double* undef,long* ier)

Saber Simulator bruger sproget MAST til at køre min C++ DLL.

Jeg kan godt få Saber til at vise en INTEGER hvis jeg returnerer den fra min C++ DLL, problemet er bare når jeg vil returnere data fra min C# DLL som min C++ dll er kodet sammen med. Så bliver output altid lig med 0.

Her er min kode:

C++ DLL:

#import "C:\Users\test\Desktop\SaberDllProjekt\DatabaseDLL\bin\Debug\DatabaseDLL.tlb" raw_interfaces_only

using namespace DatabaseDLL;

extern "C" _declspec(dllexport) void X2_X3(
double* in,long* nin,double* ifl,long* nifl,double* out,
long* nout,double* ofl,long* nofl,double* undef,long* ier)

{

double input= in[0];

HRESULT hr = CoInitialize(NULL);

iDatabaseDLLPtr piDatabaseDLL(__uuidof(ManagedDatabaseDLL));

double result;

hr = piDatabaseDLL->HentDatabaseDLL(input, &result);

CoUninitialize();

out[0] = result;

}


C# DLL:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.Runtime.InteropServices;

namespace MinDatabaseDLL
{

    public interface iDatabaseDLL
    {

        double HentDatabaseDLL
            (

          double MotorID
            );
    }

    public class ManagedDatabaseDLL : iDatabaseDLL
    {
       

        public double HentDatabaseDLL
            (
          double MotorID
            )

        {
            double motorID = 0;
            double tempMotorID = 0;

            SqlConnection thisConnection = new SqlConnection(@"udkommenteret;");

            SqlCommand thisCommand = thisConnection.CreateCommand();

            thisCommand.CommandText = "SELECT * FROM Motor.dbo.MotorData WHERE MotorID = @MotorID";

            thisCommand.Parameters.AddWithValue("@MotorID", MotorID);

            thisConnection.Open();

            SqlDataReader thisReader = thisCommand.ExecuteReader();

            while (thisReader.Read())
            {
                try
                {
                    tempMotorID = (thisReader.GetInt32(thisReader.GetOrdinal("MotorID")));
                }
                catch (SqlNullValueException)
                {
                }
            }

            motorID = tempMotorID;

            thisConnection.Close();

            return motorID;

        }


    }
}