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diff --git a/TAO/tao/DynamicAny/DynUnion_i.h b/TAO/tao/DynamicAny/DynUnion_i.h
new file mode 100644
index 00000000000..819b8a10391
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+++ b/TAO/tao/DynamicAny/DynUnion_i.h
@@ -0,0 +1,161 @@
+// -*- C++ -*-
+//
+// $Id$
+
+//=============================================================================
+/**
+ *  @file    DynUnion_i.h
+ *
+ *  $Id$
+ *
+ *  @author Jeff Parsons <parsons@cs.wustl.edu>
+ */
+//=============================================================================
+
+
+#ifndef TAO_DYNUNION_I_H
+#define TAO_DYNUNION_I_H
+#include /**/ "ace/pre.h"
+
+#include "tao/DynamicAny/DynamicAny.h"
+
+#if !defined (ACE_LACKS_PRAGMA_ONCE)
+# pragma once
+#endif /* ACE_LACKS_PRAGMA_ONCE */
+
+#include "tao/DynamicAny/DynCommon.h"
+#include "tao/LocalObject.h"
+
+#if defined (_MSC_VER)
+# pragma warning(push)
+# pragma warning (disable:4250)
+#endif /* _MSC_VER */
+
+TAO_BEGIN_VERSIONED_NAMESPACE_DECL
+
+/**
+ * @class TAO_DynUnion_i
+ *
+ * Implementation of Dynamic Any type for Unions.
+ */
+class TAO_DynamicAny_Export TAO_DynUnion_i
+  : public virtual DynamicAny::DynUnion,
+    public virtual TAO_DynCommon,
+    public virtual TAO_Local_RefCounted_Object
+{
+public:
+  /// Constructor.
+  TAO_DynUnion_i (void);
+
+  /// Destructor.
+  ~TAO_DynUnion_i (void);
+
+  /// Constructor taking an Any argument.
+  void init (const CORBA::Any& any);
+
+  /// Constructor taking a typecode argument.
+  void init (CORBA::TypeCode_ptr tc);
+
+  // = LocalObject methods.
+  static TAO_DynUnion_i *_narrow (
+      CORBA::Object_ptr obj
+      );
+
+  // = Functions specific to DynUnion.
+
+  virtual DynamicAny::DynAny_ptr get_discriminator (
+      void)
+;
+
+  virtual void set_discriminator (
+      DynamicAny::DynAny_ptr d
+      )
+;
+
+  virtual void set_to_default_member (
+      void)
+;
+
+  virtual void set_to_no_active_member (
+      void)
+;
+
+  virtual CORBA::Boolean has_no_active_member (
+      void)
+;
+
+  virtual CORBA::TCKind discriminator_kind (
+      void)
+;
+
+  virtual DynamicAny::DynAny_ptr member (
+      void)
+;
+
+  virtual char * member_name (
+      void)
+;
+
+  virtual CORBA::TCKind member_kind (
+      void)
+;
+
+  // = DynAny common functions not implemented in class TAO_DynCommon.
+
+  virtual void from_any (
+      const CORBA::Any & value
+      )
+;
+
+  virtual CORBA::Any * to_any (
+      void)
+;
+
+  virtual CORBA::Boolean equal (
+      DynamicAny::DynAny_ptr dyn_any
+      )
+;
+
+  virtual void destroy (
+      void)
+;
+
+  virtual DynamicAny::DynAny_ptr current_component (
+      void)
+;
+
+private:
+  /// Code common to the constructor from an Any arg and the member
+  /// function from_any().
+  void set_from_any (const CORBA::Any &any
+                     );
+
+  /// Called by both versions of init().
+  void init_common (void);
+
+  /// Iterative check for label value match.
+  CORBA::Boolean label_match (const CORBA::Any &my_any,
+                              const CORBA::Any &other_any
+                              );
+
+  /// Use copy() or assign() instead of these.
+  TAO_DynUnion_i (const TAO_DynUnion_i &src);
+  TAO_DynUnion_i &operator= (const TAO_DynUnion_i &src);
+
+private:
+  /// Just two components.
+  DynamicAny::DynAny_var member_;
+  DynamicAny::DynAny_var discriminator_;
+
+  /// The active member's slot in the union type code.
+  CORBA::ULong member_slot_;
+};
+
+TAO_END_VERSIONED_NAMESPACE_DECL
+
+#if defined(_MSC_VER)
+# pragma warning(pop)
+#endif /* _MSC_VER */
+
+#include /**/ "ace/post.h"
+#endif /* TAO_DYNUNION_I_H */