diff --git a/EXE_GdbGetSurf.cpp b/EXE_GdbGetSurf.cpp
index 7fff7bf..2f5ae6c 100644
--- a/EXE_GdbGetSurf.cpp
+++ b/EXE_GdbGetSurf.cpp
@@ -1494,4 +1494,37 @@ ExeExtractSurfBezierLoops( int nId, int nDestGrpId, int* pnCount)
    if ( pnCount != nullptr)
       *pnCount = nCount ;
    return nFirstId ;
+}
+
+//----------------------------------------------------------------------------
+int
+ExeShowSurfBezierControlPoints( int nSrfId, int* pnCount)
+{
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, false)
+   int nParent = pGeomDB->GetParentId( nSrfId) ;
+   // recupero la superficie di bezier
+   IGeoObj* pGeoObj = pGeomDB->GetGeoObj( nSrfId) ;
+   if ( pGeoObj->GetType() != SRF_BEZIER)
+      return GDB_ID_NULL ;
+   int nDegU = - 1, nDegV = - 1, nSpanU = - 1, nSpanV = - 1 ;
+   bool bRat = false, bTrimmed = false ;
+   ISurfBezier* pSrfBez = GetSurfBezier( pGeoObj) ;
+   pSrfBez->GetInfo( nDegU, nDegV, nSpanU, nSpanV, bRat, bTrimmed) ;
+   int nFirstId = -1 ;
+   int nCount = 0 ;
+   for ( int i = 0 ; i < (nDegU * nSpanU + 1) * ( nDegV * nSpanV + 1) ; ++i) {
+      bool bOk = true ;
+      IGeoPoint3d* pGeoPt( CreateGeoPoint3d()) ;
+      pGeoPt->Set( pSrfBez->GetControlPoint( i, &bOk)) ;
+      int nId = pGeomDB->AddGeoObj( GDB_ID_NULL, nParent, pGeoPt) ;
+      if ( nFirstId == GDB_ID_NULL)
+         nFirstId = nId ;
+      if ( nId != GDB_ID_NULL)
+         ++nCount ;
+   }
+   // restituisco i risultati
+   if ( pnCount != nullptr)
+      *pnCount = nCount ;
+   return nFirstId ;
 }
\ No newline at end of file
diff --git a/LUA_GdbGetSurf.cpp b/LUA_GdbGetSurf.cpp
index 3bd9111..b840355 100644
--- a/LUA_GdbGetSurf.cpp
+++ b/LUA_GdbGetSurf.cpp
@@ -1080,6 +1080,28 @@ LuaExtractSurfBezierLoops( lua_State* L)
    return 2 ;
 }
 
+//----------------------------------------------------------------------------
+static int
+LuaShowSurfBezierControlPoints( lua_State* L)
+{
+   // 1 parametro : nCrvId
+   int nCrvId ;
+   LuaCheckParam( L, 1, nCrvId)
+      LuaClearStack( L) ;
+   int nCount = 0 ;
+   int nId = ExeShowSurfBezierControlPoints( nCrvId, &nCount) ;
+   // restituisco il risultato
+   if ( nId != GDB_ID_NULL) {
+      LuaSetParam( L, nId) ;
+      LuaSetParam( L, nCount) ;  
+   }
+   else {
+      LuaSetParam( L) ;
+      LuaSetParam( L) ;
+   }
+   return 2 ;
+}
+
 //-------------------------------------------------------------------------------
 bool
 LuaInstallGdbGetSurf( LuaMgr& luaMgr)
@@ -1130,5 +1152,6 @@ LuaInstallGdbGetSurf( LuaMgr& luaMgr)
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezierGetControlCurveU", LuaSurfBezierGetControlCurveU) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtSurfBezierGetControlCurveV", LuaSurfBezierGetControlCurveV) ;
    bOk = bOk && luaMgr.RegisterFunction( "EgtExtractSurfBezierLoops", LuaExtractSurfBezierLoops) ;
+   bOk = bOk && luaMgr.RegisterFunction( "EgtShowSurfBezierControlPoints", LuaShowSurfBezierControlPoints) ;
    return bOk ;
 }