Имя компа в верхнем регистре C++

                char buffer1[256];
        unsigned long size1 = 256;
        GetComputerName(buffer1, &size1);

#include <iostream>
#include<stdio.h>
#include<Winsock2.h>
#pragma comment(lib, "Ws2_32.lib")
#pragma warning(disable:4996)
 
using namespace std;
 
void spos1() {
    char szPath[128] = "";
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    gethostname(szPath, sizeof(szPath));
    printf("%s", szPath);
    WSACleanup();
}
 
void spos2() {
    cout << getenv("COMPUTERNAME");
}
 
void spos3() {
    TCHAR szBuffer[MAX_COMPUTERNAME_LENGTH + 1];
    DWORD dwSize = MAX_COMPUTERNAME_LENGTH + 1;
    GetComputerName(szBuffer, &dwSize); 
    printf("%s", szBuffer);
}
 
void spos4() {
    TCHAR buffer[256] = TEXT("");
    TCHAR szDescription[8][32] = { TEXT("NetBIOS"),
        TEXT("DNS hostname"),
        //TEXT("DNS domain"),
        //TEXT("DNS fully-qualified"),
        TEXT("Physical NetBIOS"),
        //TEXT("Physical DNS hostname"),
        //TEXT("Physical DNS domain"),
        //TEXT("Physical DNS fully-qualified") 
    };
    int cnf = 0;
    DWORD dwSize = sizeof(buffer);
 
    for (cnf = 0; cnf < ComputerNameMax; cnf++)
    {
        if (!GetComputerNameEx((COMPUTER_NAME_FORMAT)cnf, buffer, &dwSize))
        {
            printf(TEXT("GetComputerNameEx failed (%d)\n"), GetLastError());
            return;
        }
        else printf(TEXT("%s: %s\n"), szDescription[cnf], buffer);
 
        dwSize = sizeof(buffer);
    }
}
 
int main(){
    spos1();
    cout << endl;
    spos2();
    cout << endl;
    spos3();
    cout << endl;
    spos4();
    system("pause");
    return 0;
}