Get UserName from SessionId

#include windows.h

#include vector

#include string

#include wtsapi32.h

#pragma comment(lib, "WtsApi32.lib")

//
typedef std::basic_string tstring;

// Get current sessions
bool EnumSessionIds(std::vector& list)
{
list.clear();

WTS_SESSION_INFO *pSI = NULL;
DWORD dwSICount;

BOOL bRes = WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pSI, &dwSICount);
if (bRes == 0)
return false;

for (unsigned int i = 0; i < pbuffer =" NULL;" bres =" WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE," bres ="=" username =" pBuffer;" pbuffer =" NULL;" bres =" WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE," bres ="=" domain =" pBuffer;"> sessionIds;
bool bRes = EnumSessionIds(sessionIds);
if (!bRes)
{
// error
return 0;
}

// enum sessions
std::vector::iterator iter;
for (iter = sessionIds.begin(); iter != sessionIds.end(); iter++)
{
// print session domain
tstring domain;
GetSessionDomain(*iter, domain);
_tprintf(_T("Session Domain = %s\n"), domain.c_str());

// print session username
tstring username;
GetSessionUserName(*iter, username);
_tprintf(_T("Session UserName = %s\n"), username.c_str());
}

return 0;
}

ref:

Windows-based application over Terminal Services using WtsAPI32 -

http://www.codeproject.com/KB/winsdk/LiviuBirjegaCode3.aspx