static extern bool SetUserObjectSecurity(IntPtr hObj, [In] ref SECURITY_INFORMATION

enum SECURITY_INFORMATION

     OWNER_SECURITY_INFORMATION = 0x01,

     GROUP_SECURITY_INFORMATION = 0x02,

     DACL_SECURITY_INFORMATION = 0x04,

     SACL_SECURITY_INFORMATION = 0x08

SECURITY_INFORMATION

        public const int OWNER_SECURITY_INFORMATION = 0x1;

                    , mqrt.OWNER_SECURITY_INFORMATION

                    , mqrt.OWNER_SECURITY_INFORMATION

SECURITY_INFORMATION

        public const int OWNER_SECURITY_INFORMATION = 0x1;

                , mqrt.OWNER_SECURITY_INFORMATION

    Private Const DACL_SECURITY_INFORMATION = 4&

    ret = GetNamedSecurityInfo(strPath, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, Nothing, Nothing, pOldDACL, Nothing, pSecDesc)

Declare Unicode Function ConvertSecurityDescriptorToStringSecurityDescriptor Lib "advapi32.dll" Alias "ConvertSecurityDescriptorToStringSecurityDescriptorW" (SD As IntPtr, SDRevision As Integer, SecurityInfo As SECURITY_INFORMATION, ByRef StringSD As IntPtr, StringSDLength As IntPtr) As Boolean

    ret = GetNamedSecurityInfo(_Path, SE_OBJECT_TYPE.SE_FILE_OBJECT, SECURITY_INFORMATION.DACL_SECURITY_INFORMATION, Nothing, Nothing, pDACL, Nothing, pSD)

    If GetNamedSecurityInfo(Path, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, Nothing, Nothing, pDACL, Nothing, pSecDesc) <> 0 Then

    SECURITY_INFORMATION SecurityInfo,

    ByVal SecurityInfo As SECURITY_INFORMATION, _

SE_OBJECT_TYPE, SECURITY_INFORMATION

        OWNER_SECURITY_INFORMATION,

    Private Const DACL_SECURITY_INFORMATION = 4&

    ret = GetNamedSecurityInfo(strPath, SE_FILE_OBJECT, DACL_SECURITY_INFORMATION, Nothing, Nothing, pOldDACL, Nothing, pSecDesc)

SECURITY_INFORMATION SecurityInfo,

        ByRef SecurityInfo As SECURITY_INFORMATION, _

        SECURITY_INFORMATION     securityInfo,

    enum SECURITY_INFORMATION

        OWNER_SECURITY_INFORMATION = 1,

        GROUP_SECURITY_INFORMATION = 2,

        DACL_SECURITY_INFORMATION = 4,

        SACL_SECURITY_INFORMATION = 8,        

        returnValue = GetSecurityInfo(fileStream.Handle, SE_OBJECT_TYPE.SE_FILE_OBJECT, SECURITY_INFORMATION.OWNER_SECURITY_INFORMATION | SECURITY_INFORMATION.DACL_SECURITY_INFORMATION, out ownerSid, out groupSid, out dacl, out sacl, out securityDescriptor);          

        SECURITY_INFORMATION SecurityInformation,

SECURITY_INFORMATION

        SECURITY_INFORMATION SecurityInformation,

SECURITY_INFORMATION

    SECURITY_INFORMATION SecurityInfo,

    ByVal SecurityInfo As SECURITY_INFORMATION, _

SE_OBJECT_TYPE, SECURITY_INFORMATION

private static extern uint SetNamedSecurityInfoW(String pObjectName, SE_OBJECT_TYPE ObjectType, SECURITY_INFORMATION SecurityInfo, IntPtr psidOwner, IntPtr psidGroup, IntPtr pDacl, IntPtr pSacl);

[Flags] private enum SECURITY_INFORMATION : uint

        SECURITY_INFORMATION sFlags = SECURITY_INFORMATION.Owner;

     SECURITY_INFORMATION.DACL_SECURITY_INFORMATION, _

const int DACL_SECURITY_INFORMATION = 0x00000004;

Const DACL_SECURITY_INFORMATION = 4&

[Flags] enum SECURITY_INFORMATION : uint

    OWNER_SECURITY_INFORMATION        = 0x00000001,

    GROUP_SECURITY_INFORMATION        = 0x00000002,

    DACL_SECURITY_INFORMATION         = 0x00000004,

    SACL_SECURITY_INFORMATION         = 0x00000008,

    UNPROTECTED_SACL_SECURITY_INFORMATION = 0x10000000,

    UNPROTECTED_DACL_SECURITY_INFORMATION = 0x20000000,

    PROTECTED_SACL_SECURITY_INFORMATION   = 0x40000000,

    PROTECTED_DACL_SECURITY_INFORMATION   = 0x80000000

Public Enum SECURITY_INFORMATION As Integer

    OWNER_SECURITY_INFORMATION = &H1

    GROUP_SECURITY_INFORMATION = &H2

    DACL_SECURITY_INFORMATION = &H4

    SACL_SECURITY_INFORMATION = &H8

    UNPROTECTED_SACL_SECURITY_INFORMATION = &H10000000

    UNPROTECTED_DACL_SECURITY_INFORMATION = &H20000000

    PROTECTED_SACL_SECURITY_INFORMATION = &H40000000

    PROTECTED_DACL_SECURITY_INFORMATION = &H80000000