?
Solved

WindowsNT system's information

Posted on 2000-02-16
7
Medium Priority
?
263 Views
Last Modified: 2013-12-03
When user press Ctrl-Alt-Del, user can see both user full name and logged name.
How can I retrieve this information, using the API's functions within WinNT enviroment?

Thanks
Reuven
0
Comment
Question by:schild
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 2528161
You can get the user's logon name by calling 'GetUserName()'.

The user's full name can be retrieved by using the LAN Manager API 'NetUserGetInfo()', an exampl follows...
0
 
LVL 86

Expert Comment

by:jkr
ID: 2528190
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <winnt.h>

#include <tchar.h>
#include <lmcons.h>
#include <lmerr.h>
#include <lmaccess.h>
#include <lmapibuf.h>

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

    char                acBuf   [   1024];

    char                acLogName   [   LM20_UNLEN  +   1];
    ULONG               ul          =   LM20_UNLEN  +   1;
    NET_API_STATUS      rc;
    USER_INFO_2*        pui2;
    DWORD               dwParmErr   =   0;

    ULONG ul;

    if  (   !GetUserName    (   acLogName,  &ul))
        {
            //  error
        }

    rc  =   NetUserGetInfo  (   NULL,
                                pwstrName,
                                2,
                                ( LPBYTE*) &pui2
                            );

    if  (   NERR_Success    !=  rc)
        {
            //  error
        }

    wsprintf    (   acBuf,
                    "Current user is '%s', the full name is '%S'\n",
                    acLogName,
                    pui2->usri2_full_name // UNICODE, thus the capital '%S' above!
                );

    printf  (   acBuf);

    NetApiBufferFree    (   pui2);


Feel free to ask if you need more information!
0
 
LVL 86

Expert Comment

by:jkr
ID: 2528206
Ooops, sorry, have to correct myself - as the 1st argument to 'NetUserGetInfo()' is expected to be a UNICODE string, too, it's better to do all that using UNICODE:

(Please forget the above code ;-)

#define UNICODE

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <winnt.h>

#include <tchar.h>
#include <lmcons.h>
#include <lmerr.h>
#include <lmaccess.h>
#include <lmapibuf.h>

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

    wchar_t             awcBuf   [   1024];

    wchar_t             awcLogName  [   LM20_UNLEN  +   1];
    ULONG               ul          =   LM20_UNLEN  +   1;
    NET_API_STATUS      rc;
    USER_INFO_2*        pui2;
    DWORD               dwParmErr   =   0;

    ULONG ul;

    if  (   !GetUserName    (   acLogName,  &ul))
        {
            //  error
        }

    rc  =   NetUserGetInfo  (   NULL,
                                awcLogName,
                                2,
                                ( LPBYTE*) &pui2
                            );

    if  (   NERR_Success    !=  rc)
        {
            //  error
        }

    wsprintf    (   awcBuf,
                    "Current user is '%s', the full name is '%s'\n",
                    awcLogName,
                    pui2->usri2_full_name
                );

    wprintf  (   awcBuf);

    NetApiBufferFree    (   pui2);
0
Veeam Task Manager for Hyper-V

Task Manager for Hyper-V provides critical information that allows you to monitor Hyper-V performance by displaying real-time views of CPU and memory at the individual VM-level, so you can quickly identify which VMs are using host resources.

 
LVL 2

Author Comment

by:schild
ID: 2539639
Hello jkr

First I want to thak you about hellping me about this request, and except few minor fixs, you gave me exactly what I needed.
The only reason I reject your answer is that I have another question that have connection with this one, and don't and I'm prommise you that if you don't wan't or you can't answer me the second one, you will have Excellent!! points for this question immediately.
If you will be kind to answer me the second question as well I will add more 200 points.

So this is your fixed code and and it is work when I'm logged in using a local user, and gaine, thank you very much. But when I'm login using Domain login, the following senario occure:
the GetUserName() retreive successfully the domain user name I type. then when I'm using this user name within NetUserGetInfo()'s function it return me error number 2221, which means "wrong user/acount name". because the local station doesn't familiar with this user account.
My question are
1. how can I know if you enter the local machine or as domain's user.
2. If user enter as a domain's user how can retrieve its full name and his/her last login time.


and for the last time, thaks you for helping.

Reuven Schild



#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <winnt.h>

#include <tchar.h>
#include <lmcons.h>
#include <lmerr.h>
#include <lmaccess.h>
#include <lmapibuf.h>

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

int main ()
{

    wchar_t             awcBuf   [1024];
    wchar_t             awcLogName  [LM20_UNLEN  +   1];
    ULONG               ul          =   LM20_UNLEN  +   1;
    NET_API_STATUS      rc;
    USER_INFO_2        *pui2;
    DWORD               dwParmErr   =   0;


      if ( NetApiBufferAllocate(sizeof(USER_INFO_2),(LPVOID *) &pui2) != NERR_Success )
      {
            printf("Can't allocate memory\n");
      }

    if  (   !GetUserName    (   awcLogName,  &ul))
    {
        printf("Can't get user name\n");
    }
      wprintf(TEXT("awcLogName = %s\n"), awcLogName);

    rc  =   NetUserGetInfo(NULL, awcLogName, 2, ( LPBYTE*) &pui2);

    if (NERR_Success !=  rc)
    {
            printf("Can't cget info\n");
    }
      wprintf(TEXT("pui2->usri2_full_name = %s\n"), pui2->usri2_full_name);


//    wsprintf    (   awcBuf,
//                    TEXT("Current user is '%s', the full name is '%s'\n"),
//                    awcLogName,
//                    TEXT(pui2->usri2_full_name)
//                );

//    wprintf(awcBuf);

    NetApiBufferFree(pui2);
      getch();

      return 0;

}
0
 
LVL 86

Accepted Solution

by:
jkr earned 1600 total points
ID: 2539733
You don't have to reject an (obviously correct) answer if you need more information1

>>1. how can I know if you enter the local machine or as
>>domain's user.

The easiest way is to compare the values of the environment variable 'USERDOMAIN' with the local computer name, e.g.

wchar_t awcEnv [ LM20_DNLEN + ,1];
wchar_t awcMachine [ MAX_COMPUTERNAME_LENGTH + 1];
DWORD dwLength = MAX_COMPUTERNAME_LENGTH + 1;

GetEnvironmentVariableW ( L"USERDOMAIN", awcEnv, LM20_DNLEN);

GetComputerNameW ( awcMachine, &dwLength);

if ( !wcsicmp ( awcMachine, awcEnv))
{
 // local account
}
else
{
 // domain account
}

(error checking omitted for brevity))

>>2. If user enter as a domain's user how can retrieve its
>>full name and his/her last login time.

This can be done by calling 'NetUserGetInfo()' at infolevel 3 and using a 'NET_USER_INFO_3' struct, as it has a member named  'usri3_last_logon' which will provide this information. Additionally, you'll have to provide the DC as the 1st parameter to this API - and this information can be retrieved by calling 'NetGetDCName()' providing the environment variable's value from above as the DC name.

(sorry for not being able to offer more code, but being at home, I have no compiler ;-)

0
 
LVL 2

Author Comment

by:schild
ID: 2539885
Adjusted points to 400
0
 
LVL 2

Author Comment

by:schild
ID: 2539914
Hello jkr


Thank you very much


Reuven Schild

0

Featured Post

Free learning courses: Active Directory Deep Dive

Get a firm grasp on your IT environment when you learn Active Directory best practices with Veeam! Watch all, or choose any amount, of this three-part webinar series to improve your skills. From the basics to virtualization and backup, we got you covered.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

zlib is a free compression library (a DLL) on which the popular gzip utility is built.  In this article, we'll see how to use the zlib functions to compress and decompress data in memory; that is, without needing to use a temporary file.  We'll be c…
What my article will show is if you ever had to do processing to a listbox without being able to just select all the items in it. My software Visual Studio 2008 crystal report v11 My issue was I wanted to add crystal report to a form and show…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question