TypeLibVarAttribute Class


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

public ref class TypeLibVarAttribute sealed : Attribute
[System.AttributeUsage(System.AttributeTargets.Field, Inherited=false)]
public sealed class TypeLibVarAttribute : Attribute
type TypeLibVarAttribute = class
    inherit Attribute
Public NotInheritable Class TypeLibVarAttribute
Inherits Attribute


The following example demonstrates how to get the TypeLibVarAttribute value of a field.

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

ref class ClassD
   static bool IsHiddenField( FieldInfo^ fi )
      array<Object^>^FieldAttributes = fi->GetCustomAttributes( TypeLibVarAttribute::typeid, true );
      if ( FieldAttributes->Length > 0 )
         TypeLibVarAttribute^ tlv = dynamic_cast<TypeLibVarAttribute^>(FieldAttributes[ 0 ]);
         TypeLibVarFlags flags = tlv->Value;
         return (flags & TypeLibVarFlags::FHidden) != (TypeLibVarFlags)0;

      return false;

using System;
using System.Reflection;
using System.Runtime.InteropServices;

namespace D
    class ClassD
        public static bool IsHiddenField( FieldInfo fi )
            object[] FieldAttributes = fi.GetCustomAttributes( typeof( TypeLibVarAttribute ), true);
            if( FieldAttributes.Length > 0 )
                TypeLibVarAttribute tlv = ( TypeLibVarAttribute )FieldAttributes[0];
                TypeLibVarFlags  flags = tlv.Value;
                return ( flags & TypeLibVarFlags.FHidden ) != 0; 
            return false;
Imports System.Reflection
Imports System.Runtime.InteropServices

Module D
    Public Function IsHiddenField(ByVal fi As FieldInfo) As Boolean
        Dim FieldAttributes As Object() = fi.GetCustomAttributes(GetType(TypeLibVarAttribute), True)

        If FieldAttributes.Length > 0 Then
            Dim tlv As TypeLibVarAttribute = FieldAttributes(0)
            Dim flags As TypeLibVarFlags = tlv.Value
            Return (flags & TypeLibVarFlags.FHidden) > 0
        End If
        Return False
    End Function
End Module


The Tlbimp.exe (Type Library Importer) applies this attribute to fields.

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



Initializes a new instance of the TypeLibVarAttribute class with the specified TypeLibVarFlags value.


Initializes a new instance of the TypeLibVarAttribute class with the specified TypeLibVarFlags value.



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

(Inherited from Attribute)

Gets the TypeLibVarFlags value for this field.



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