TypeLibTypeAttribute Class


Contains the TYPEFLAGS that were originally imported for this type from the COM type library.

public ref class TypeLibTypeAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Enum | System.AttributeTargets.Interface | System.AttributeTargets.Struct, Inherited=false)]
public sealed class TypeLibTypeAttribute : Attribute
type TypeLibTypeAttribute = class
    inherit Attribute
Public NotInheritable Class TypeLibTypeAttribute
Inherits Attribute


The following example demonstrates how to get the TypeLibTypeAttribute value of a class or interface.

using namespace System;
using namespace System::Runtime::InteropServices;

ref class ClassB
   static bool IsHiddenInterface( Type^ InterfaceType )
      array<Object^>^InterfaceAttributes = InterfaceType->GetCustomAttributes( TypeLibTypeAttribute::typeid, false );
      if ( InterfaceAttributes->Length > 0 )
         TypeLibTypeAttribute^ tlt = dynamic_cast<TypeLibTypeAttribute^>(InterfaceAttributes[ 0 ]);
         TypeLibTypeFlags flags = tlt->Value;
         return (flags & TypeLibTypeFlags::FHidden) != TypeLibTypeFlags(0);

      return false;
using System;
using System.Runtime.InteropServices;

namespace B
    class ClassB	
        public static bool IsHiddenInterface( Type InterfaceType )
            object[] InterfaceAttributes = InterfaceType.GetCustomAttributes( typeof( TypeLibTypeAttribute ), false );
            if( InterfaceAttributes.Length > 0 )
                TypeLibTypeAttribute tlt = ( TypeLibTypeAttribute ) InterfaceAttributes[0];
                TypeLibTypeFlags  flags = tlt.Value;
                return ( flags & TypeLibTypeFlags.FHidden ) != 0; 
            return false;

Imports System.Runtime.InteropServices

Module B
    Public Function IsHiddenInterface(ByVal InterfaceType As Type) As Boolean
        Dim InterfaceAttributes As Object() = _
        InterfaceType.GetCustomAttributes(GetType(TypeLibTypeAttribute), False)

        If InterfaceAttributes.Length > 0 Then
            Dim tlt As TypeLibTypeAttribute = InterfaceAttributes(0)
            Dim flags As TypeLibTypeFlags = tlt.Value
            Return (flags & TypeLibTypeFlags.FHidden) > 0
        End If

        Return False
    End Function
End Module


The Tlbimp.exe (Type Library Importer) applies this attribute to classes or interfaces.

This attribute is applied when a type library is imported and should never be changed. It is only applied when the method's TYPEFLAGS evaluate to non-zero. The attribute is designed to be used by tools that need to know how the original TYPEFLAGS were set. The common language runtime does not use this attribute.



Initializes a new instance of the TypeLibTypeAttribute class with the specified TypeLibTypeFlags value.


Initializes a new instance of the TypeLibTypeAttribute class with the specified TypeLibTypeFlags value.



When implemented in a derived class, gets a unique identifier for this Attribute.

(Inherited from Attribute)

Gets the TypeLibTypeFlags value for this type.



Returns a value that indicates whether this instance is equal to a specified object.

(Inherited from Attribute)

Returns the hash code for this instance.

(Inherited from Attribute)

Gets the Type of the current instance.

(Inherited from Object)

When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(Inherited from Attribute)

When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(Inherited from Attribute)

Creates a shallow copy of the current Object.

(Inherited from Object)

Returns a string that represents the current object.

(Inherited from Object)

Explicit Interface Implementations

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

Maps a set of names to a corresponding set of dispatch identifiers.

(Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

Retrieves the type information for an object, which can be used to get the type information for an interface.

(Inherited from Attribute)

Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

Provides access to properties and methods exposed by an object.

(Inherited from Attribute)

Applies to

See also