diff --git a/EGkGeoCollection.h b/EGkGeoCollection.h
index e3d1ad7..a62a5c6 100644
--- a/EGkGeoCollection.h
+++ b/EGkGeoCollection.h
@@ -23,6 +23,12 @@
 typedef std::vector<Point3d>   PNTVECTOR ;   // vettore di punti
 typedef std::list<Point3d>     PNTLIST ;     // lista di punti
 typedef std::vector<PNTVECTOR> PNTMATRIX ;   // matrice di punti
+                                             
+//----------------------------------------------------------------------------
+// Raccolte di coppie Point3d,int
+typedef std::pair<Point3d,int> POINTI ;      // coppia punto, intero
+typedef std::vector<POINTI>    PNTIVECTOR ;  // vettore di coppie punto, intero
+typedef std::list<POINTI>      PNTILIST ;    // lista di coppie punto, intero
 
 //----------------------------------------------------------------------------
 // Raccolte di coppie Point3d,dU
diff --git a/EGkPolyLine.h b/EGkPolyLine.h
index 1c2caf9..216e95f 100644
--- a/EGkPolyLine.h
+++ b/EGkPolyLine.h
@@ -139,3 +139,4 @@ EGK_EXPORT bool IsPointInsidePolyLine( const Point3d& ptP, const PolyLine& plPol
 EGK_EXPORT bool GetPointParamOnPolyLine( const Point3d& ptP, const PolyLine& plPoly, double dToler, double& dPar) ;
 EGK_EXPORT bool ChangePolyLineStart( PolyLine& plPoly, const Point3d& ptNewStart, double dToler) ;
 EGK_EXPORT bool SplitPolyLineAtPoint( const PolyLine& plPoly, const Point3d& ptP, double dToler, PolyLine& plPoly1, PolyLine& plPoly2) ;
+EGK_EXPORT bool AssociatePolyLinesMinDistPoints( const PolyLine& PL1, const PolyLine& PL2, PNTIVECTOR& vPnt1, PNTIVECTOR& vPnt2, bool& bCommonInternalPoints) ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 643c6c6..8f9326b 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -520,7 +520,8 @@ EXE_EXPORT bool ExeChangeClosedCurveStart( int nId, double dU) ;
 EXE_EXPORT bool ExeChangeClosedCurveStartPoint( int nId, const Point3d& ptP, int nRefType) ;
 EXE_EXPORT bool ExeModifyCurveStartPoint( int nId, const Point3d& ptP, int nRefType) ;
 EXE_EXPORT bool ExeModifyCurveEndPoint( int nId, const Point3d& ptP, int nRefType) ;
-EXE_EXPORT bool ExeSpiralizeCurve( int nId, double dDelta) ;
+EXE_EXPORT bool ExeSpiralizeCurveAlongExtrusion( int nId, double dDelta) ;
+EXE_EXPORT bool ExeSpiralizeCurveAlongGuide( int nCrvId, int nGuideId, double dLinTol) ;
 EXE_EXPORT bool ExeModifyCurveExtrusion( const INTVECTOR& vIds, const Vector3d& vtExtr, int nRefType) ;
 EXE_EXPORT bool ExeModifyCurveThickness( const INTVECTOR& vIds, double dThick) ;
 EXE_EXPORT bool ExeTrimCurveStartAtLen( int nId, double dLen) ;