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GetUserObjectInformation info  Overview  Group

The GetUserObjectInformation function returns information about a window station or desktop object.

BOOL GetUserObjectInformation(

    HANDLE hObj,

// handle of object to get information for

    int nIndex,

// type of information to get

    PVOID pvInfo,

// points to buffer that receives the information

    DWORD nLength,

// size, in bytes, of pvInfo buffer

    LPDWORD lpnLengthNeeded

// receives required size, in bytes, of pvInfo buffer

   );

Parameters

hObj
Identifies the window station or desktop object for which to return information. This can be an HDESK or HWINSTA handle (for example, a handle returned by CreateWindowStation, OpenWindowStation, CreateDesktop, or OpenDesktop).
nIndex
Specifies the object information to be retrieved. The parameter must be one of the following values:

Value

Description

UOI_FLAGS

Returns handle flags. The pvInfo parameter must point to a USEROBJECTFLAGS structure.

UOI_NAME

Returns a string containing the name of the object.

UOI_TYPE

Returns a string containing the type name of the object.

UOI_USER_SID

Returns the SID structure that identifies the user that is currently associated with the specified object. If no user is associated with the object, the value returned in the buffer pointed to by lpnLengthNeeded is zero. Note that SID is a variable length structure. You will usually make a call to GetUserObjectInformation to determine the length of the SID before retrieving its value.

pvInfo
Points to a buffer to receive the object information.
nLength
Specifies the size, in bytes, of the buffer pointed to by the pvInfo parameter.
lpnLengthNeeded
Points to a variable receiving the number of bytes required to store the requested information. If this variable’s value is greater than the value of the nLength parameter when the function returns, the function returns FALSE, and none of the information is copied to the pvInfo buffer. If the value of the variable pointed to by lpnLengthNeeded is less than or equal to the value of nLength, the entire information block is copied.

Return Values

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, call GetLastError.

See Also

CreateDesktop, CreateWindowStation, GetUserObjectSecurity, OpenDesktop, OpenWindowStation, SetUserObjectInformation, SetUserObjectSecurity, SID, USEROBJECTFLAGS 

See also:


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