diff --git a/EGkOffsetCurve.h b/EGkOffsetCurve.h
index 26a6cab..aac1efd 100644
--- a/EGkOffsetCurve.h
+++ b/EGkOffsetCurve.h
@@ -37,10 +37,13 @@ class OffsetCurve
       EGK_EXPORT ICurve* GetCurve( void) ;
       EGK_EXPORT ICurve* GetLongerCurve( void) ;
       EGK_EXPORT ICurve* GetShorterCurve( void) ;
+      EGK_EXPORT bool GetPointOffset( Point3d& pt, Vector3d& vt) ;
       EGK_EXPORT double GetLinTol( void) const { return m_dLinTol ; }
       EGK_EXPORT void SetLinTol( double dTol) { m_dLinTol = dTol ; }
 
    private :
       ICURVEPLIST m_CrvLst ;
+      Point3d m_pt = P_INVALID ;
+      Vector3d m_vt = V_INVALID ;
       double m_dLinTol ;
 } ;
\ No newline at end of file
diff --git a/EGkSelection.h b/EGkSelection.h
index 7859466..a537518 100644
--- a/EGkSelection.h
+++ b/EGkSelection.h
@@ -36,6 +36,8 @@ struct SelData {
       : nId( nI), nSub( SEL_SUB_ALL) {}
    SelData( int nI, int nS)
       : nId( nI), nSub( nS) {}
+   bool operator == ( const SelData& other) const
+         { return ( nId == other.nId  &&  nSub == other.nSub) ; }
 } ;
 
 //----------------------------------------------------------------------------