define own struct, C++ (vc++)

define own struct

#define _WIN32_WINNT _WIN32_WINNT_VISTA

#include <windows.h>
#include <io.h>

#include <memory>
#include <string>
#include <iostream>
#include <iomanip>

inline bool isMsysPty(int fd) noexcept
{
    // Dynamic load for binary compability with old Windows
    const auto ptrGetFileInformationByHandleEx
      = reinterpret_cast<decltype(&GetFileInformationByHandleEx)>(
        GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")),
                       "GetFileInformationByHandleEx"));
    if (!ptrGetFileInformationByHandleEx) {
        return false;
    }

HANDLE h = reinterpret_cast<HANDLE>(_get_osfhandle(fd));
    if (h == INVALID_HANDLE_VALUE) {
        return false;
    }

// Check that it's a pipe:
    if (GetFileType(h) != FILE_TYPE_PIPE) {
        return false;
    }

// POD type is binary compatible with FILE_NAME_INFO from WinBase.h
    // It have the same alignment and used to avoid UB in caller code
    struct MY_FILE_NAME_INFO {
        DWORD FileNameLength;
        WCHAR FileName[MAX_PATH];
    };

auto pNameInfo = std::unique_ptr<MY_FILE_NAME_INFO>(
      new (std::nothrow) MY_FILE_NAME_INFO());
    if (!pNameInfo) {
        return false;
    }

// Check pipe name is template of
    // {"cygwin-","msys-"}XXXXXXXXXXXXXXX-ptyX-XX
    if (!ptrGetFileInformationByHandleEx(h, FileNameInfo, pNameInfo.get(), 
                                         sizeof(MY_FILE_NAME_INFO))) {
        return false;
    }
    std::wstring name(pNameInfo->FileName, pNameInfo->FileNameLength / sizeof(WCHAR));
    if ((name.find(L"msys-") == std::wstring::npos
         && name.find(L"cygwin-") == std::wstring::npos)
        || name.find(L"-pty") == std::wstring::npos) {
        return false;
    }

return true;
}

int main()
{
    std::cout << " stdin msys: " << isMsysPty(_fileno(stdin)) << '\n'
                << "stdout msys: " << isMsysPty(_fileno(stdout)) << '\n'
                << "stderr msys: " << isMsysPty(_fileno(stderr)) << std::endl;
}


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