#include <iostream>

#include <Windows.h>

using std::cout;

using std::endl;

// 获取Windows文件夹的路径

//UINT GetWindowsDirectory(LPTSTR lpBuffer,UINT uSize)

//获取systrm32文件夹的路径

//UINT GetSystemDirectory(LPTSTR lpBuffer,UINT uSize)

//这两个函数的使用方法很简单，和以前一样有两种方法来确定缓冲区的长度：

//1、Windows定义了一个文件路径的最长长度的常量MAX_PATH(值为260)，我们可以用它来建立字符串缓冲区；

//2、给缓冲区传入NULL，调用函数成功后将返回缓冲区的长度。

int main()

{

    char* buf = nullptr;

    // 调用成功后，返回缓冲区的长度,返回windows文件夹的路径

    UINT Size = GetWindowsDirectory(NULL,);

    buf = new char [Size];

    cout << Size << endl;

    if( != GetWindowsDirectoryA(buf,Size))

        cout << "WindowsDirectory path is :" << endl << buf << endl;

    else

        cout << "failed. GetLastError() :" << GetLastError() << endl;

    delete buf;

    buf = nullptr;

    cout << endl;

    // 调用成功后，返回缓冲区的长度，返回系统路径

    Size = GetSystemDirectory(NULL,);

    buf = new char [Size];

    cout << Size << endl;

    if( != GetSystemDirectoryA(buf,Size))

        cout << "WindowsDirectory path is :" << endl << buf << endl;

    else

        cout << "failed. GetLastError() :" << GetLastError() << endl;

    delete buf;

    buf = nullptr;

    cout << endl;

    system("pause");

    return ;

}