diff --git a/EGkSfrCreate.h b/EGkSfrCreate.h
index 0066574..6c2ae75 100644
--- a/EGkSfrCreate.h
+++ b/EGkSfrCreate.h
@@ -35,6 +35,8 @@ EGK_EXPORT ISurfFlatRegion* GetSurfFlatRegionFromFatCurve( ICurve* pCrv, double
 EGK_EXPORT ISurfFlatRegion* GetSurfFlatRegionFromTriangle( const Triangle3d& Tria) ;
 EGK_EXPORT ISurfFlatRegion* GetSurfFlatRegionFromPolyLine( const PolyLine& ContourPolyLine) ;
 EGK_EXPORT ISurfFlatRegion* GetSurfFlatRegionFromPolyLineVector( const POLYLINEVECTOR& vContoursPolyLineVec) ;
+EGK_EXPORT bool CalcRegionPolyLines( const CICURVEPVECTOR& vpCurve, double dLinTol, POLYLINEVECTOR& vPL, Vector3d& vtN) ;
+
 
 //----------------------------------------------------------------------------
 class SurfFlatRegionByContours