C++Builder调用Matlab

C++Builder编程如下：
#include <vcl.h>
#pragma hdrstop

#include"libtest.h"
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
: TForm(Owner)
{
}
//---------------------------------------------------------------------------

void __fastcall TForm1::Button1Click(TObject *Sender)
{
//DLL初始化
HINSTANCE hins=LoadLibrary("libtest.dll");
GetProcAddress((HMODULE)hins, (LPCTSTR)"_libtestInitialize");
GetProcAddress((HMODULE)hins, (LPCTSTR)"_mlftest");
GetProcAddress((HMODULE)hins, (LPCTSTR)"_libtestTerminate");
test();
Memo1->Lines->LoadFromFile("F:\\test.txt");
}
test.m如下：
function test()
x=3;
y = x*2;
fid=fopen('F:\test.txt','w+');
fprintf(fid,'%f',y);
status=fclose('all');
将其编译成dll文件后供C++Builder调用，出现错误如下：

怎么修改？？求助……