diff --git a/API_GdbModifySurf.cpp b/API_GdbModifySurf.cpp
index c40054a..efd08dd 100644
--- a/API_GdbModifySurf.cpp
+++ b/API_GdbModifySurf.cpp
@@ -28,16 +28,23 @@ __stdcall EgtInvertSurface( int nId)
    return ( ExeInvertSurface( vIds) ? TRUE : FALSE) ;
 }
 
+//-------------------------------------------------------------------------------
+int
+__stdcall EgtExplodeSurface( int nId, int* pnCount)
+{
+   return ExeExplodeSurface( nId, pnCount) ;
+}
+
+//----------------------------------------------------------------------------
+int
+__stdcall EgtExtractSurfFrChunkLoops( int nId, int nChunk, int nDestGrpId, int* pnCount)
+{
+   return ExeExtractSurfFrChunkLoops( nId, nChunk, nDestGrpId, pnCount) ;
+}
+
 //----------------------------------------------------------------------------
 int
 __stdcall EgtExtractSurfTmFacetLoops( int nId, int nFacet, int nDestGrpId, int* pnCount)
 {
    return ExeExtractSurfTmFacetLoops( nId, nFacet, nDestGrpId, pnCount) ;
 }
-
-//-------------------------------------------------------------------------------
-int
-__stdcall EgtExplodeSurfTm( int nId, int* pnCount)
-{
-   return ExeExplodeSurfTm( nId, pnCount) ;
-}
diff --git a/API_GdbObjSelection.cpp b/API_GdbObjSelection.cpp
index b40294a..8428f56 100644
--- a/API_GdbObjSelection.cpp
+++ b/API_GdbObjSelection.cpp
@@ -70,9 +70,9 @@ __stdcall EgtIsSelectedObj( int nId)
 
 //-----------------------------------------------------------------------------
 int
-__stdcall EgtGetSelectedObjNbr( void)
+__stdcall EgtGetSelectedObjCount( void)
 {
-   return ExeGetSelectedObjNbr() ;
+   return ExeGetSelectedObjCount() ;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/API_GdbPartLayers.cpp b/API_GdbPartLayers.cpp
index f156f88..c532215 100644
--- a/API_GdbPartLayers.cpp
+++ b/API_GdbPartLayers.cpp
@@ -63,9 +63,9 @@ __stdcall EgtResetCurrPartLayer( void)
 
 //-------------------------------------------------------------------------------
 int
-__stdcall EgtGetPartNbr( BOOL bOnlyVisible)
+__stdcall EgtGetPartCount( BOOL bOnlyVisible)
 {
-   return ExeGetPartNbr( ( bOnlyVisible != FALSE)) ;
+   return ExeGetPartCount( ( bOnlyVisible != FALSE)) ;
 }
 
 //-------------------------------------------------------------------------------
diff --git a/API_GeoSnap.cpp b/API_GeoSnap.cpp
index 9aaa090..86f1410 100644
--- a/API_GeoSnap.cpp
+++ b/API_GeoSnap.cpp
@@ -315,10 +315,30 @@ __stdcall EgtCurveCompoCenter( int nId, int nSimpCrv, int nRefId, double ptCen[3
 }
 
 //----------------------------------------------------------------------------
-int
-__stdcall EgtSurfTmFacetNbr( int nId)
+BOOL
+__stdcall EgtSurfFrNormVersor( int nId, int nRefId, double vtNorm[3])
 {
-   return ExeSurfTmFacetNbr( nId) ;
+  // recupero il vettore normale
+   Vector3d vtTmp ;
+   if ( ! ExeSurfFrNormVersor( nId, nRefId, vtTmp))
+      return FALSE ;
+  // lo assegno
+   VEC_FROM_3D( vtNorm, vtTmp)
+   return TRUE ;
+}
+
+//----------------------------------------------------------------------------
+int
+__stdcall EgtSurfFrChunkCount( int nId)
+{
+   return ExeSurfFrChunkCount( nId) ;
+}
+
+//----------------------------------------------------------------------------
+int
+__stdcall EgtSurfTmFacetCount( int nId)
+{
+   return ExeSurfTmFacetCount( nId) ;
 }
 
 //----------------------------------------------------------------------------
diff --git a/API_MachMgr.cpp b/API_MachMgr.cpp
index 963f57d..3d47065 100644
--- a/API_MachMgr.cpp
+++ b/API_MachMgr.cpp
@@ -29,9 +29,9 @@ __stdcall EgtInitMachMgr( const wchar_t* wsMachinesDir)
 
 //-----------------------------------------------------------------------------
 int
-__stdcall EgtGetMachGroupNbr( void)
+__stdcall EgtGetMachGroupCount( void)
 {
-   return ExeGetMachGroupNbr() ;
+   return ExeGetMachGroupCount() ;
 }
 
 //-----------------------------------------------------------------------------
diff --git a/EgtInterface.rc b/EgtInterface.rc
index 0ecc369..7623aa6 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ