Terminal server - unique client ID

Hi,
how can i get a unique client id ?
is there an api ?

i tried the following :

WTS_INFO_CLASS WTSInfoClass = WTSClientBuildNumber;
int rc = QuerySessionInformation(WTS_CURRENT_SERVER_HANDLE,WTS_CURRENT_SESSION,WTSInfoClass,&pBuffer,&pBytesReturned);

but its not a unique because 2 computers that connected with terminal server had the same number.

hgilAsked:
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omkConnect With a Mentor Commented:
And why not to use user specific functions?
it is like 1-2-3
1.The WTSEnumerateSessions function retrieves a list of sessions on a specified terminal server.
WTS_SESSION_INFO structures. Each structure in the array contains information about a session on the specified terminal server
2.The WTSQueryUserToken function obtains the primary access token of the logged-on user specified by the session ID
3.The WTSQueryUserConfig and WTSSetUserConfig functions enable you to set and retrieve configuration information for a specified user account. The WTS_CONFIG_CLASS enumeration type defines the user configuration parameters.
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