diff --git a/EGkSfrCreate.h b/EGkSfrCreate.h
index 6c2ae75..fea6cd4 100644
--- a/EGkSfrCreate.h
+++ b/EGkSfrCreate.h
@@ -35,7 +35,7 @@ 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) ;
+EGK_EXPORT bool CalcRegionPolyLines( const POLYLINEVECTOR& vPL, POLYLINEVECTOR& vPLOrd, Vector3d& vtN, INTMATRIX& vnPLIndMat) ;
 
 
 //----------------------------------------------------------------------------
diff --git a/EGkSurfTriMesh.h b/EGkSurfTriMesh.h
index e1491f8..8a9da18 100644
--- a/EGkSurfTriMesh.h
+++ b/EGkSurfTriMesh.h
@@ -50,7 +50,7 @@ class __declspec( novtable) ISurfTriMesh : public ISurf
       virtual bool RemoveTriangle( int nId) = 0 ;
       virtual bool AdjustTopology( void) = 0 ;
       virtual bool CreateByFlatContour( const PolyLine& PL) = 0 ;
-      virtual bool CreateByRegion( const POLYLINEVECTOR& vPL) = 0 ;
+      virtual bool CreateByRegion( const POLYLINEVECTOR& vPL, const INTMATRIX& vnPLIndMat) = 0 ;
       virtual bool CreateByExtrusion( const PolyLine& PL, const Vector3d& vtExtr) = 0 ;
       virtual bool CreateByPointCurve( const Point3d& ptP, const PolyLine& PL) = 0 ;
       virtual bool CreateByTwoCurves( const PolyLine& PL1, const PolyLine& PL2, int nRuledType) = 0 ;