diff --git a/EGkSurfFlatRegion.h b/EGkSurfFlatRegion.h
index 1d0c2ea..6842148 100644
--- a/EGkSurfFlatRegion.h
+++ b/EGkSurfFlatRegion.h
@@ -55,6 +55,7 @@ class __declspec( novtable) ISurfFlatRegion : public ISurf
       virtual int  GetChunkSimpleClassification( int nChunk, const ISurfFlatRegion& Other, int nOthChunk) const ;   // compare only outsides
       virtual bool GetChunkMaxOffset( int nChunk, double& dOffs) const = 0 ;
       virtual int  GetLoopCount( int nChunk) const = 0 ;
+      virtual int  GetLoopCurveCount( int nChunk, int nLoop) const = 0 ;
       virtual ICurve* GetLoop( int nChunk, int nLoop) const = 0 ;   // nChunk 0-based, nLoop 0-based (1°esterno, successivi interni) 
       virtual bool ApproxLoopWithLines( int nChunk, int nLoop, double dLinTol, double dAngTolDeg, int nType, PolyLine& PL) const = 0 ;
       virtual bool SetCurveTempProp( int nChunk, int nLoop, int nCrv, int nProp, int nPropInd = 0) = 0 ;