Hi!

I have a call to WTSQuerySessionInformation with WTSSessionID as the information class parameter. When running in Windows XP Pro SP3 and Vista (both 32 bit) and a single user is logged on, the value for the session ID that is returned is 0. However, when running in Windows 7 Ultimate (64 bit) and a single user is logged on, the value for the session ID is now 1. Can anyone explain this?

The aim of the call to WTSQuerySessionInformation is to try to determine how many users are logged on, so if there are any suggestions as to an alternative way of doing this I would be very grateful.

Many thanks in advance!

It sounds like you skipped Vista or you would have heard of the infamous session 0 where all services now live. Google "vista session 0". I'd guess you ought to enumerate the sessions instead with WTSEnumerateSessions and look for WTS_SESSION_INFO.State == WTSActive.

But this all has very little to do with the 64-bit .NET framework, the topic of this forum. Ask more questions in the Windows SDK forum.

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Hans Passant.

It sounds like you skipped Vista or you would have heard of the infamous session 0 where all services now live. Google "vista session 0". I'd guess you ought to enumerate the sessions instead with WTSEnumerateSessions and look for WTS_SESSION_INFO.State == WTSActive.

But this all has very little to do with the 64-bit .NET framework, the topic of this forum. Ask more questions in the Windows SDK forum.

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Hans Passant.