更改代码 将下面代码用户级别倒叙插入链表：do // begin do { // 调用NetLocalGroupEnum 参数设置与NetLocalGroup类似 nStatus = NetLocalGroupEnum( NULL, dwLevel, (LPBYTE*)&pBuf, dwPrefMaxLen, &dwEntriesRead, &dwTotalEntries, (PDWORD_PTR)&dwResumeHandle); if ((nStatus == NERR_Success) || (nStatus == ERROR_MORE_DATA)) { if ((pTmpBuf = pBuf) != NULL) { for (int i = 0; i < dwEntriesRead; i++) { //pTmpBuf = pBuf + dwEntriesRead - i; assert(pTmpBuf != NULL); if (pTmpBuf == NULL) { break; } CString csSID = GetSystemSID(pTmpBuf->grpi0_name); if (csSID.Compare(_T("S-1-5-32-544")) == 0) { listAdminGroup.AddTail(pTmpBuf->grpi0_name); } else { if(CheckDisplayGroup(csSID)) { UserLevel* plevel = new UserLevel; plevel->nLevel = plist.GetCount(); _tcsncpy_s(plevel->LevelName,32,pTmpBuf->grpi0_name,31); plist.AddTail(plevel); } } pTmpBuf++; dwTotalCount++; } } } // 释放内存 if (pBuf != NULL) { NetApiBufferFree(pBuf); pBuf = NULL; } }while (nStatus == ERROR_MORE_DATA); // end do

更改后的代码如下：

do // begin do
{
    // 调用NetLocalGroupEnum 参数设置与NetLocalGroup类似
    nStatus = NetLocalGroupEnum(
        NULL,
        dwLevel,
        (LPBYTE*)&pBuf,
        dwPrefMaxLen,
        &dwEntriesRead,
        &dwTotalEntries,
        (PDWORD_PTR)&dwResumeHandle);
    if ((nStatus == NERR_Success) || (nStatus == ERROR_MORE_DATA))
    {
        if ((pTmpBuf = pBuf) != NULL)
        {
            for (int i = 0; i < dwEntriesRead; i++)
            {
                //pTmpBuf = pBuf + dwEntriesRead - i;
                assert(pTmpBuf != NULL);
                if (pTmpBuf == NULL)
                {
                    break;
                }
                CString csSID = GetSystemSID(pTmpBuf->grpi0_name);
                if (csSID.Compare(_T("S-1-5-32-544")) == 0)
                {
                    listAdminGroup.AddTail(pTmpBuf->grpi0_name);
                }
                else
                {
                    if (CheckDisplayGroup(csSID))
                    {
                        UserLevel* plevel = new UserLevel;
                        plevel->nLevel = plist.GetCount();
                        _tcsncpy_s(plevel->LevelName, 32, pTmpBuf->grpi0_name, 31);
                        plist.InsertHead(plevel);  // 将用户级别插入链表头部
                    }
                }
                pTmpBuf++;
                dwTotalCount++;
            }
        }
    }
    // 释放内存
    if (pBuf != NULL)
    {
        NetApiBufferFree(pBuf);
        pBuf = NULL;
    }
} while (nStatus == ERROR_MORE_DATA); // end do

更改的内容是将用户级别插入链表的方式从原来的 `plist.AddTail(plevel)` 改为 `plist.InsertHead(plevel)`，这样就能够将用户级别倒序插入链表了。