CopyFile错误代码2 C ++代码::块

Question

我在使用GNU GCC编译器和Windows 7使用Code :: Blocks来使CopyFile（）函数工作时遇到了一些麻烦 无论我在哪里放置文件，即Root，Public Documents，包含.cpp程序的foulder我都无法复制简单的文本文件。它总是返回错误代码2 error_file_not_found

#include <iostream>
#include <fstream>    //allows files to be streamed into this program
#include <windows.h>  // included for copying a file
#include <tchar.h>    // included because I am grasping at straws
#include <stdio.h>    // included because I am grasping at straws
#include <cstdlib>    // included because I am grasping at straws

using namespace std;
int main(){

bool b = CopyFile("C:\\test.txt","C:\\test2.txt",0);
if (!b) {
    cout << "Error: " << GetLastError() << endl;
} else {
    cout << "Okay " << endl;
}
return 0;
}

有什么建议吗？