Question

I want to get users of a group using NetGroupGetUsers function.

DWORD dwError = 0;
NET_API_STATUS nStatus;
LPDWORD entriesread=0;
LPDWORD totalentries=0;
LPBYTE *buff;
nStatus=NetGroupGetUsers(NULL,L"Users",0,buff,MAX_PREFERRED_LENGTH,
                          entriesread,totalentries,NULL);

When i use this i get this error;

xC0000005: Access violation reading location 0xffffffffffffffff.

And how can i read buff when it works? And also i tried this;

GROUP_USERS_INFO_0 *buff;
nStatus=NetGroupGetUsers(NULL,L"Users",0,(LPBYTE*)&buff,MAX_PREFERRED_LENGTH,
entriesread,totalentries,NULL);

but same error occurred.

EDIT: nStatus value is NERR_GroupNotFound i think the reason of the access violation is trying to read buff which isn’t actually set.

EDIT 2: i used this function NetLocalGroupGetMembers. now it gives success but the buff->grui0_name is meaningless. there is a user named “ali” but the value of the buff->grui0_name is just “d”. WHAT AM I DOING WRONG?

The Last Code;

LPCWSTR TargetGroup = L"group1";

DWORD dwError = 0;
NET_API_STATUS stat;

GROUP_USERS_INFO_0 *buff;
LPDWORD entriesread=new DWORD;
LPDWORD totalentries=new DWORD;

stat=NetGroupGetUsers(NULL,TargetGroup,0,(LPBYTE *)&buff,MAX_PREFERRED_LENGTH,
                          entriesread,totalentries,NULL);

for EDIT 2;

stat=NetLocalGroupGetMembers(NULL,TargetGroup,0,(LPBYTE *)&buff,
                  MAX_PREFERRED_LENGTH,entriesread,totalentries,NULL);

Please help…

Answer 1

LPCWSTR TargetGroup = L"group1";

NET_API_STATUS stat;

LOCALGROUP_MEMBERS_INFO_1 *buff;
LPDWORD entriesread=new DWORD;
LPDWORD totalentries=new DWORD;

stat=NetLocalGroupGetMembers(NULL,TargetGroup,1,(LPBYTE *)&buff,
                        MAX_PREFERRED_LENGTH,entriesread,totalentries,NULL);



wprintf(buff->lgrmi1_name);

This code is working great now. Thanks to everybody.