service: WTS_SESSION_LOGOFF event in SESSION CHANGED

[Deepak_Sharma]

hello

i am trying to capture the user information form the service through the HandlerEx Functions while registering.

i am able to get username and domain name by using WTSQueryInformation () API at WTS_SESSION_LOGON. but when i query at "WTS_SESSION_LOGOFF" nothing comes.

UINT GetUserInfoFromSessionID ( DWORD SessionId, CString & sUserName, CString & sDomainName )
{
	UINT nResult = ERROR_SUCCESS;

	LPTSTR  ppBuffer  = NULL;
	DWORD   pBytesReturned = 0;
	//query domain
	if( WTSQuerySessionInformation( WTS_CURRENT_SERVER_HANDLE,
									SessionId,
									WTSDomainName,
									&ppBuffer,
									&pBytesReturned ) )
	{
		sDomainName = CString( ppBuffer );
	}
	else
	{
		nResult = GetLastError();
		MLOGERR(_T("Failed to Get DomainName From SessionID Error:%d"),nResult);
	}
	WTSFreeMemory( ppBuffer );
	
	//query UserName

	if( WTSQuerySessionInformation( WTS_CURRENT_SERVER_HANDLE,
		SessionId,
		WTSUserName,
		&ppBuffer,
		&pBytesReturned) )
	{
		sUserName = CString( ppBuffer );
	}
	else
	{
		nResult = GetLastError();
		MLOGERR(_T("Failed to Get UserName From SessionID Error:%d"),nResult);	
	}

	WTSFreeMemory( ppBuffer );

	return nResult;
}

the error i got is Error:2 = The system cannot find the file specified.


has any one encountered this before?

regards
deepak

[kirants]

Hm.. perhaps on logoff, the tokeis invalid and domain name and user name doesn't make sense anymore.