void FreeURL(string networkURL, string securityDescriptor)

     HTTP_SERVICE_CONFIG_URLACL_PARAM urlAclParam = new HTTP_SERVICE_CONFIG_URLACL_PARAM(securityDescriptor);

void ReserveURL(string networkURL, string securityDescriptor)

     HTTP_SERVICE_CONFIG_URLACL_PARAM paramDesc = new HTTP_SERVICE_CONFIG_URLACL_PARAM(securityDescriptor);

        public uint lpSecurityDescriptor;

    // Not currently supported: IPropertyDescriptionList

  public interface _ZoneSecurityDemo

  [ProgId("IEZoneSecurity.ZoneSecurityDemo")]

  public class ZoneSecurityDemo : System.Windows.Forms.Control, _ZoneSecurityDemo

  MyObject = new ActiveXObject("IEZoneSecurity.ZoneSecurityDemo");

public class IObjectSafetyDemo : IObjectSafety

    void GetPropertyDescriptionList ( [In] ref NativeMethods.PROPERTYKEY keyType, [In] ref Guid riid, out IntPtr ppv );

    Function GetPropertyDescriptionList(<[In]()> keyType As PROPERTYKEY, <[In]()> riid As Guid, ByRef ppv As IntPtr) As Integer

        public static extern bool SetSecurityDescriptorDacl(ref SECURITY_DESCRIPTOR securityDescriptor, bool daclPresent, IntPtr dacl, bool daclDefaulted);

        public static extern bool InitializeSecurityDescriptor(out SECURITY_DESCRIPTOR securityDescriptor, uint dwRevision);

            public IntPtr lpSecurityDescriptor;

            IntPtr securityDescPtr = new IntPtr( 0 );

                    Native.SECURITY_DESCRIPTOR securityDesc;

                    worked = Native.InitializeSecurityDescriptor( out securityDesc, SdRevisionLevel );

                    worked = Native.SetSecurityDescriptorDacl(ref securityDesc, true, IntPtr.Zero, false);

                    securityDescPtr = Marshal.AllocCoTaskMem( Marshal.SizeOf( securityDesc ) );

                    Marshal.StructureToPtr( securityDesc, securityDescPtr, false );

                    secAttribs.lpSecurityDescriptor = securityDescPtr;

                if( securityDescPtr != IntPtr.Zero )

                    Marshal.FreeCoTaskMem( securityDescPtr );

        IntPtr pipeSecurityDescriptor        // SD

  public IntPtr pSecurityDescriptor; //хз))

     this.pSecurityDescriptor = IntPtr.Zero;

    InvalidSecurityDescr = 0xc0000079,

GetSecurityDescriptorControl

GetSecurityDescriptorDacl

GetSecurityDescriptorGroup

GetSecurityDescriptorOwner

GetSecurityDescriptorSacl

SetSecurityDescriptorControl

SetSecurityDescriptorDacl

SetSecurityDescriptorGroup

SetSecurityDescriptorOwner

SetSecurityDescriptorSacl

    SecurityDelegation

    SecurityDelegation

private const uint SECURITY_DELEGATION     = ((uint)SECURITY_IMPERSONATION_LEVEL.SecurityDelegation     << 16);

    , IntPtr pSecurityDescriptor

                , IntPtr pSecurityDescriptor

            byte[] securityDescriptor;

            securityDescriptor = new byte[length];

            GCHandle hSD = GCHandle.Alloc(securityDescriptor, GCHandleType.Pinned);

                string message = "There was an error calling MQGetQueueSecurity to read the SecurityDescriptor."

            //owner = getSecurityDescriptorOwnerName(securityDescriptor);

    , IntPtr pSecurityDescriptor

        , IntPtr pSecurityDescriptor

                , IntPtr pSecurityDescriptor

            //Call advapi32!InitializeSecurityDescriptor()

            //Call advapi32!SetSecurityDescriptorOwner()

        aObjectAttributes.SecurityDescriptor = IntPtr.Zero;

    private IntPtr mSecurityDescriptor;

        mSecurityDescriptor = IntPtr.Zero;

    public IntPtr SecurityDescriptor

        get { return mSecurityDescriptor; }

        set { mSecurityDescriptor = value; }

static extern TODO ConvertSecurityDescriptorToStringSecurityDescriptor(TODO);

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

static extern bool ConvertStringSecurityDescriptorToSecurityDescriptor(;

  string    StringSecurityDescriptor,

  out IntPtr    SecurityDescriptor,

  out UIntPtr   SecurityDescriptorSize

Declare Function ConvertStringSecurityDescriptorToSecurityDescriptor Lib "advapi32.dll" (TODO) As TODO

            ManagementBaseObject inParams1 = UserObject.GetMethodParameters("GetSecurityDescriptor");

            ManagementBaseObject outParams1 = UserObject.InvokeMethod("GetSecurityDescriptor", inParams1, null);

    inParams["SecurityDescriptor"] = Descriptor;

            #region SecurtyDescriptor

    static extern bool GetSecurityDescriptorDacl(

        IntPtr pSecurityDescriptor,

            GetSecurityDescriptorDacl(shareInfo.shi502_security_descriptor, out bDaclPresent, ref pAcl, out bDaclDefaulted);

    out IntPtr pSecurityDescriptor);

    ByRef pSecurityDescriptor As IntPtr) As Integer

        public static extern Int32 GetSecurityDescriptorLength(IntPtr pSecurityDescriptor);

Declare Function GetSecurityDescriptorLength Lib "advapi32.dll" (TODO) As TODO

out IntPtr pSecurityDescriptor);

        out IntPtr          securityDescriptor);

        IntPtr securityDescriptor = IntPtr.Zero;

        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);          

        LocalFree(securityDescriptor);

static extern bool InitializeSecurityDescriptor(out SECURITY_DESCRIPTOR SecurityDescriptor, uint dwRevision);

Private Shared Function InitializeSecurityDescriptor(ByRef SecurityDescriptor As SECURITY_DESCRIPTOR, dwRevision As UInteger) As Boolean

SECURITY_DESCRIPTOR securityDesc = new SECURITY_DESCRIPTOR();

InitializeSecurityDescriptor(out securityDesc, 1);

SetSecurityDescriptorDacl(ref securityDesc, true, IntPtr.Zero, false);

    internal IntPtr SecurityDescriptor;

        lsaAttr.SecurityDescriptor = IntPtr.Zero;

    internal IntPtr SecurityDescriptor;

        lsaAttr.SecurityDescriptor = IntPtr.Zero;

        aObjectAttributes.SecurityDescriptor = IntPtr.Zero;

            ObjectAttributes.SecurityDescriptor = IntPtr.Zero;

            public IntPtr SecurityDescriptor;

        public IntPtr SecurityDescriptor;

        objectAttributes.SecurityDescriptor = IntPtr.Zero;

New in .NET v2.0: Security.AccessControl namespace, including gems to manipulate DACLs in raw (binary) form. So rather than using a ref SECURITY_DESCRIPTOR I'd advocate using a byte[] and RawSecurityDescriptor(byte[], 0). See sample code below.

RawSecurityDescriptor rsd = new RawSecurityDescriptor(psd, 0);

        out SECURITY_DESCRIPTOR pSecurityDescriptor,

        ref UInt32 lpcbSecurityDescriptor);

        ref SECURITY_DESCRIPTOR pSecurityDescriptor);

     SecurityDelegation

    SecurityDelegation

SecurityDelegation

static extern bool SetSecurityDescriptorDacl(ref SECURITY_DESCRIPTOR sd, bool daclPresent, IntPtr dacl, bool daclDefaulted);

<DllImportAttribute("advapi32.dll", EntryPoint:="SetSecurityDescriptorDacl")>

Private Shared Function SetSecurityDescriptorDacl(ByRef pSecurityDescriptor As SECURITY_DESCRIPTOR, <MarshalAsAttribute(UnmanagedType.Bool)> ByVal bDaclPresent As Boolean, <InAttribute()> ByVal pDacl As System.IntPtr, <MarshalAsAttribute(UnmanagedType.Bool)> ByVal bDaclDefaulted As Boolean) As UInteger

SECURITY_DESCRIPTOR securityDesc = new SECURITY_DESCRIPTOR();

InitializeSecurityDescriptor(out securityDesc, 1);

SetSecurityDescriptorDacl(ref securityDesc, true, IntPtr.Zero, false);

    GetSecurityDescriptorGroup(pSecurityDescriptor, out pSidGroup , out retref);

    GetSecurityDescriptorOwner(pSecurityDescriptor, out pSidOwner, out retref));

    GetSecurityDescriptorDacl(pSecurityDescriptor, out present, out pDacl, out retref);

    GetSecurityDescriptorSacl(pSecurityDescriptor, out present, out pSacl, out retref);

    public long lpSecurityDescriptor;

     public string pStringSecurityDescriptor;

     public HTTP_SERVICE_CONFIG_URLACL_PARAM(string securityDescriptor)

     pStringSecurityDescriptor = securityDescriptor;

    Public pStringSecurityDescriptor As String

    Public Sub New(ByVal stringSecurityDescriptor As String)

        pStringSecurityDescriptor = StringSecurityDescriptor

   public IntPtr SecurityDescriptor;

   Dim SecurityDescriptor As IntPtr

    Public SecurityDescriptor As IntPtr

        SecurityDescriptor = IntPtr.Zero

   public IntPtr SecurityDescriptor;

     SecurityDescriptor = IntPtr.Zero;

        public IntPtr pSecurityDescriptor;

        Public pSecurityDescriptor As IntPtr

    public unsafe byte* lpSecurityDescriptor;

    public IntPtr lpSecurityDescriptor;

   Public lpSecurityDescriptor As IntPtr

        public IntPtr lpSecurityDescriptor;

            byte[] src = security.GetSecurityDescriptorBinaryForm();

            lpSecurityAttributes.lpSecurityDescriptor = dest;

   public IntPtr SecurityDescriptor;

objAttributes.SecurityDescriptor = IntPtr.Zero;

    public IntPtr lpSecurityDescriptor;

   out uint lpcbMaxValueLen, IntPtr lpSecurityDescriptor, IntPtr lpftLastWriteTime);