SHADOWSTATECLASS - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _WINSTA_H

typedef enum _SHADOWSTATECLASS
{
    State_NoShadow, // No shadow operations are currently being performed on this session.
    State_Shadowing, // The session is shadowing a different session. The current session is referred to as a shadow client.
    State_Shadowed // The session is being shadowed by a different session. The current session is referred to as a shadow target.
} SHADOWSTATECLASS;

#endif

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This type is documented in the [MS-TSTS] specification.