获取windows所有用户名

#include <LM.h>#pragma comment(lib, "netapi32.lib")// See more: http://msdn.microsoft.com/en-us/library/windows/desktop/aa370652(v=vs.85).aspxvoid 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);}