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wtsqueryusertoken (wtsapi32)
Retrieve the primary access token for the user associated with the specified session ID. The caller must be running in the context of the LocalSystem account and have the SE_TCB_NAME privilege. Only highly trusted service should use this function. The application must not leak tokens, and close the token when it has finished using it.

C# Signature:

[DllImport("wtsapi32.dll", SetLastError=true)]
static extern bool WTSQueryUserToken(UInt32 sessionId, out IntPtr Token);

VB Signature:

Declare Function WTSQueryUserToken Lib "wtsapi32.dll" (ByVal SessionId As UInt32, ByRef Token As IntPtr) As Boolean

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