diff --git a/EGkCDeClosedSurfTmClosedSurfTm.h b/EGkCDeClosedSurfTmClosedSurfTm.h
index a7e6e0c..d710784 100644
--- a/EGkCDeClosedSurfTmClosedSurfTm.h
+++ b/EGkCDeClosedSurfTmClosedSurfTm.h
@@ -33,5 +33,6 @@ EGK_EXPORT bool CDeClosedSurfTmClosedSurfTm( const ISurfTriMesh& SurfA, const IS
 
 //----------------------------------------------------------------------------
 // Verifica l'interferenza tra le due superfici : restituisce true in caso di interferenza.
+// Se richiesta verifica inclusione se una delle due è chiusa controlla l'inclusione dell'altra. 
 //----------------------------------------------------------------------------
-EGK_EXPORT bool TestSurfTmSurfTm( const ISurfTriMesh& SurfA, const ISurfTriMesh& SurfB, double dSafeDist) ;
+EGK_EXPORT bool TestSurfTmSurfTm( const ISurfTriMesh& SurfA, const ISurfTriMesh& SurfB, double dSafeDist, bool bTestEnclosion = false) ;
diff --git a/EXeExecutor.h b/EXeExecutor.h
index 3de5b07..245115e 100644
--- a/EXeExecutor.h
+++ b/EXeExecutor.h
@@ -967,7 +967,7 @@ EXE_EXPORT int  ExeTestRectPrismoidSurface( const Frame3d& frPrismoid, double dB
 EXE_EXPORT int  ExeTestCylSurface( const Frame3d& frCyl, double dR, double dH, int nSurfId, double dSafeDist, int nRefType) ;
 EXE_EXPORT int  ExeTestConeSurface( const Frame3d& frCone, double dR1, double dR2, double dH, int nSurfId, double dSafeDist, int nRefType) ;
 EXE_EXPORT int  ExeTestSpheSurface( const Point3d& ptCen, double dR, int nSurfId, double dSafeDist, int nRefType) ;
-EXE_EXPORT int  ExeTestSurfaceSurface( int nSurf1Id, int nSurf2Id, double dSafeDist) ;
+EXE_EXPORT int  ExeTestSurfaceSurface( int nSurf1Id, int nSurf2Id, double dSafeDist, bool bTestEnclosion = false) ;
 
 // Maximum Filler
 EXE_EXPORT bool ExeMaxFillerStart( void) ;