#include <LM.h>

#pragma comment(lib, "netapi32.lib")

// See more: http://msdn.microsoft.com/en-us/library/windows/desktop/aa370652(v=vs.85).aspx

void GetAllUserName(std::vector<std::wstring> & allUserName) {

    LPUSER_INFO_1 pBuf = NULL;

    LPUSER_INFO_1 pTmpBuf;

    DWORD dwLevel = 1;

    DWORD dwEntriesRead = 0;

    DWORD dwTotalEntries = 0;

    DWORD dwResumeHandle = 0;

    DWORD dwPrefMaxLen = MAX_PREFERRED_LENGTH;

    NET_API_STATUS nStatus;

    LPTSTR pszServerName = NULL;

    do {

        nStatus = NetUserEnum((LPCWSTR) pszServerName,

            dwLevel,

            FILTER_NORMAL_ACCOUNT, // global users

            (LPBYTE*)&pBuf,

            dwPrefMaxLen,

            &dwEntriesRead,

            &dwTotalEntries,

            &dwResumeHandle);

        if ((nStatus == NERR_Success) || (nStatus == ERROR_MORE_DATA)) {

            if ((pTmpBuf = pBuf) != NULL) {

                for (DWORD i = 0; i < dwEntriesRead; i++) {

                    if (pTmpBuf == NULL) {

                        fprintf(stderr, "An access violation has occurred\n");

                        break;

                    }

                    allUserName.push_back(pTmpBuf->usri1_name);

                    pTmpBuf++;

                }

            }

        }

        else

            fprintf(stderr, "A system error has occurred: %d\n", nStatus);

        if (pBuf != NULL) {

            NetApiBufferFree(pBuf);

            pBuf = NULL;

        }

    }

    while (nStatus == ERROR_MORE_DATA); // end do

    // Check again for allocated memory.

    if (pBuf != NULL)

        NetApiBufferFree(pBuf);

}