diff --git a/API_GdbModifyCurve.cpp b/API_GdbModifyCurve.cpp
index 3a6157d..c6b8ea9 100644
--- a/API_GdbModifyCurve.cpp
+++ b/API_GdbModifyCurve.cpp
@@ -49,6 +49,13 @@ __stdcall EgtApproxCurve( int nId, int nApprType, double dLinTol)
    return ( ExeApproxCurve( nId, nApprType, dLinTol) ? TRUE : FALSE) ;
 }
 
+//-------------------------------------------------------------------------------
+BOOL
+__stdcall EgtProjectCurveOnPlane( int nId, const double ptP[3], const double vtN[3], int nRefType)
+{
+   return ( ExeProjectCurveOnPlane( nId, ptP, vtN, nRefType) ? TRUE : FALSE) ;
+}
+
 //----------------------------------------------------------------------------
 BOOL
 __stdcall EgtChangeClosedCurveStartPoint( int nId, const double ptP[3], int nRefType)
@@ -186,6 +193,34 @@ __stdcall EgtModifyArc3P( int nId, const double ptMid[3], int nRefType)
    return ( ExeModifyArc3P( nId, ptMid, nRefType) ? TRUE : FALSE) ;
 }
 
+//-------------------------------------------------------------------------------
+BOOL
+__stdcall EgtCloseCurveCompo( int nId)
+{
+   return ( ExeCloseCurveCompo( nId) ? TRUE : FALSE) ;
+}
+
+//-------------------------------------------------------------------------------
+BOOL
+__stdcall EgtAddCurveCompoLine( int nId, const double ptP[3], int nRefType)
+{
+   return ( ExeAddCurveCompoLine( nId, ptP, nRefType) ? TRUE : FALSE) ;
+}
+
+//-------------------------------------------------------------------------------
+BOOL
+__stdcall EgtAddCurveCompoArcTg( int nId, const double ptP[3], int nRefType)
+{
+   return ( ExeAddCurveCompoArcTg( nId, ptP, nRefType) ? TRUE : FALSE) ;
+}
+
+//-------------------------------------------------------------------------------
+BOOL
+__stdcall EgtAddCurveCompoArc2P( int nId, const double ptMid[3], const double ptP[3], int nRefType)
+{
+   return ( ExeAddCurveCompoArc2P( nId, ptMid, ptP, nRefType) ? TRUE : FALSE) ;
+}
+
 //-------------------------------------------------------------------------------
 BOOL
 __stdcall EgtAddCurveCompoJoint( int nId, double dU)
diff --git a/API_GeoBase.cpp b/API_GeoBase.cpp
index 505cd71..665a473 100644
--- a/API_GeoBase.cpp
+++ b/API_GeoBase.cpp
@@ -375,6 +375,18 @@ __stdcall EgtFrameOCS( double ptO[3], double vtDirZ[3],
    return TRUE ;
 }
 
+//-----------------------------------------------------------------------------
+int
+__stdcall EgtFrameGetType( const double ptOrig[3],
+                           const double vtX[3], const double vtY[3], const double vtZ[3])
+{
+  // costruisco il riferimento
+   Frame3d frTemp ;
+   frTemp.Set( ptOrig, vtX, vtY, vtZ) ;
+  // ne ricavo il tipo
+   return frTemp.GetType() ;
+}
+
 //-----------------------------------------------------------------------------
 BOOL
 __stdcall EgtFrameTranslate( double ptOrig[3], double vtX[3], double vtY[3], double vtZ[3],
@@ -481,6 +493,21 @@ __stdcall EgtFrameLocToLoc( double ptOrig[3], double vtX[3], double vtY[3], doub
 
 //-----------------------------------------------------------------------------
 //                        BBox3d
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtBBoxTranslate( double ptMin[3], double ptMax[3],
+                            const double vtMove[3])
+{
+  // eseguo la trasformazione
+   BBox3d b3Temp ;
+   b3Temp.Set( ptMin, ptMax) ;
+   if ( ! b3Temp.Translate( vtMove))
+      return FALSE ;
+  // aggiorno i parametri del box
+   VEC_FROM_3D( ptMin, b3Temp.GetMin())
+   VEC_FROM_3D( ptMax, b3Temp.GetMax())
+   return TRUE ;
+}
 
 //-----------------------------------------------------------------------------
 BOOL
diff --git a/API_GeoSnap.cpp b/API_GeoSnap.cpp
index 72f8854..345656f 100644
--- a/API_GeoSnap.cpp
+++ b/API_GeoSnap.cpp
@@ -213,11 +213,46 @@ __stdcall EgtCurveLengthAtPoint( int nId, const double ptOn[3], double dExtend,
    return ( ExeCurveLengthAtPoint( nId, ptOn, dExtend, pdLen) ? TRUE : FALSE) ;
 }
 
+//----------------------------------------------------------------------------
+BOOL
+__stdcall EgtCurveIsClosed( int nId)
+{
+   return ( ExeCurveIsClosed( nId) ? TRUE : FALSE) ;
+}
+
+//----------------------------------------------------------------------------
+BOOL
+__stdcall EgtCurveIsFlat( int nId, double vtN[3], double* pdDist)
+{
+   if ( vtN == nullptr  ||  pdDist == nullptr)
+      return FALSE ;
+   Plane3d Plane ;
+   if ( ! ExeCurveIsFlat( nId, Plane)) 
+      return FALSE ;
+   VEC_FROM_3D( vtN, Plane.vtN)
+   *pdDist = Plane.dDist ;
+   return true ;
+}
+
 //----------------------------------------------------------------------------
 BOOL
 __stdcall EgtCurveAreaXY( int nId, double* pdArea)
 {
-   return ( ExeCurveAreaXY( nId, pdArea) ? TRUE : FALSE) ;
+   return ( ExeCurveAreaXY( nId, *pdArea) ? TRUE : FALSE) ;
+}
+
+//----------------------------------------------------------------------------
+BOOL
+__stdcall EgtCurveArea( int nId, double vtN[3], double* pdDist, double* pdArea)
+{
+   if ( vtN == nullptr  ||  pdDist == nullptr  ||  pdArea == nullptr)
+      return FALSE ;
+   Plane3d Plane ;
+   if ( ! ExeCurveArea( nId, Plane, *pdArea)) 
+      return FALSE ;
+   VEC_FROM_3D( vtN, Plane.vtN)
+   *pdDist = Plane.dDist ;
+   return true ;
 }
 
 //----------------------------------------------------------------------------
diff --git a/EgtInterface.rc b/EgtInterface.rc
index bc1d5b4..6e774ab 100644
Binary files a/EgtInterface.rc and b/EgtInterface.rc differ