WinStationQueryInformationW - NtDoc

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

/**
 * The WinStationQueryInformationW routine retrieves information about a window station.
 *
 * @param ServerHandle A handle to an RD Session Host server. Specify a handle opened by the WinStationOpenServerW function, or specify WINSTATION_CURRENT_SERVER to indicate the server on which your application is running.
 * @param SessionId A Remote Desktop Services session identifier.
 * To indicate the session in which the calling application is running (or the current session) specify WINSTATION_CURRENT_SESSION.
 * Only specify WINSTATION_CURRENT_SESSION when obtaining session information on the local server.
 * If WINSTATION_CURRENT_SESSION is specified when querying session information on a remote server, the returned session information will be inconsistent. Do not use the returned data.
 * @param WinStationInformationClass A value from the TOKEN_INFORMATION_CLASS enumerated type identifying the type of information to be retrieved.
 * @param WinStationInformation Pointer to a caller-allocated buffer that receives the requested information about the token.
 * @param WinStationInformationLength Length, in bytes, of the caller-allocated TokenInformation buffer.
 * @param ReturnLength Pointer to a caller-allocated variable that receives the actual length, in bytes, of the information returned in the TokenInformation buffer.
 * @return BOOLEAN Nonzero if the function succeeds, or zero otherwise. To get extended error information, call GetLastError.
 * @sa https://learn.microsoft.com/en-us/previous-versions/aa383827(v=vs.85)
 */
NTSYSAPI
BOOLEAN
NTAPI
WinStationQueryInformationW(
    _In_opt_ HANDLE ServerHandle,
    _In_ ULONG SessionId,
    _In_ WINSTATIONINFOCLASS WinStationInformationClass,
    _Out_writes_bytes_(WinStationInformationLength) PVOID WinStationInformation,
    _In_ ULONG WinStationInformationLength,
    _Out_ PULONG ReturnLength
    );

#endif

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NtDoc

This function is a wrapper over an RPC method documented in the [MS-TSTS] specification.