diff --git a/API_GdbObjSelection.cpp b/API_GdbObjSelection.cpp
index 539ac56..0e79f2d 100644
--- a/API_GdbObjSelection.cpp
+++ b/API_GdbObjSelection.cpp
@@ -23,16 +23,6 @@
 using namespace std ;
 
 
-//-----------------------------------------------------------------------------
-BOOL
- __stdcall EgtIsSelectedObj( int nId)
- {
-   IGeomDB* pGeomDB = GetCurrGeomDB() ;
-   VERIFY_GEOMDB( pGeomDB, FALSE)
-  // verifico se l'oggetto è selezionato
-   return ( pGeomDB->IsSelectedObj( nId) ? TRUE : FALSE) ;
- }
-
 //-----------------------------------------------------------------------------
 BOOL
  __stdcall EgtSelectObj( int nId)
@@ -62,3 +52,33 @@ BOOL
   // deseleziono tutto
    return ( pGeomDB->ClearSelection() ? TRUE : FALSE) ;
  }
+
+//-----------------------------------------------------------------------------
+BOOL
+ __stdcall EgtIsSelectedObj( int nId)
+ {
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, FALSE)
+  // verifico se l'oggetto è selezionato
+   return ( pGeomDB->IsSelectedObj( nId) ? TRUE : FALSE) ;
+ }
+
+//-----------------------------------------------------------------------------
+int
+ __stdcall EgtGetFirstSelectedObj( void)
+ {
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, FALSE)
+  // recupero il primo oggetto selezionato
+   return pGeomDB->GetFirstSelectedObj() ;
+ }
+
+//-----------------------------------------------------------------------------
+int
+ __stdcall EgtGetNextSelectedObj( void)
+ {
+   IGeomDB* pGeomDB = GetCurrGeomDB() ;
+   VERIFY_GEOMDB( pGeomDB, FALSE)
+  // recupero il successivo oggetto selezionato
+   return pGeomDB->GetNextSelectedObj() ;
+ }
diff --git a/API_GeoTransform.cpp b/API_GeoTransform.cpp
index f4cfbf4..f088968 100644
--- a/API_GeoTransform.cpp
+++ b/API_GeoTransform.cpp
@@ -26,8 +26,21 @@ __stdcall EgtMove( int nId, double vVtMove[3])
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo traslazione
-   return ( pGeomDB->Translate( nId, vVtMove) ? TRUE : FALSE) ;
+  // eseguo traslazione singola
+   if ( nId != GDB_ID_SEL) {
+      return ( pGeomDB->Translate( nId, vVtMove) ? TRUE : FALSE) ;
+   }
+  // eseguo traslazione dei selezionati
+   else {
+      bool bOk = true ;
+      int nI = pGeomDB->GetFirstSelectedObj() ;
+      while ( nI != GDB_ID_NULL  &&  bOk) {
+         if ( ! pGeomDB->Translate( nI, vVtMove))
+            bOk = false ;
+         nI = pGeomDB->GetNextSelectedObj() ;
+      }
+      return ( bOk ? TRUE : FALSE) ;
+   }
 }
 
 //-------------------------------------------------------------------------------
@@ -36,8 +49,21 @@ __stdcall EgtMoveGlob( int nId, double vVtMove[3])
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo traslazione
-   return ( pGeomDB->TranslateGlob( nId, vVtMove) ? TRUE : FALSE) ;
+  // eseguo traslazione singola
+   if ( nId != GDB_ID_SEL) {
+      return ( pGeomDB->TranslateGlob( nId, vVtMove) ? TRUE : FALSE) ;
+   }
+  // eseguo traslazione dei selezionati
+   else {
+      bool bOk = true ;
+      int nI = pGeomDB->GetFirstSelectedObj() ;
+      while ( nI != GDB_ID_NULL  &&  bOk) {
+         if ( ! pGeomDB->TranslateGlob( nI, vVtMove))
+            bOk = false ;
+         nI = pGeomDB->GetNextSelectedObj() ;
+      }
+      return ( bOk ? TRUE : FALSE) ;
+   }
 }
 
 //-------------------------------------------------------------------------------
@@ -46,8 +72,21 @@ __stdcall EgtMoveGroup( int nId, double vVtMove[3])
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo traslazione
-   return ( pGeomDB->TranslateGroup( nId, vVtMove) ? TRUE : FALSE) ;
+  // eseguo traslazione singola
+   if ( nId != GDB_ID_SEL) {
+      return ( pGeomDB->TranslateGroup( nId, vVtMove) ? TRUE : FALSE) ;
+   }
+  // eseguo traslazione dei selezionati
+   else {
+      bool bOk = true ;
+      int nI = pGeomDB->GetFirstSelectedObj() ;
+      while ( nI != GDB_ID_NULL  &&  bOk) {
+         if ( ! pGeomDB->TranslateGroup( nI, vVtMove))
+            bOk = false ;
+         nI = pGeomDB->GetNextSelectedObj() ;
+      }
+      return ( bOk ? TRUE : FALSE) ;
+   }
 }
 
 //-------------------------------------------------------------------------------
@@ -56,8 +95,21 @@ __stdcall EgtRotate( int nId, double vPtAx[3], double vVtAx[3], double dAngRotDe
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo rotazione
-   return ( pGeomDB->Rotate( nId, vPtAx, vVtAx, dAngRotDeg) ? TRUE : FALSE) ;
+  // eseguo rotazione singola
+   if ( nId != GDB_ID_SEL) {
+      return ( pGeomDB->Rotate( nId, vPtAx, vVtAx, dAngRotDeg) ? TRUE : FALSE) ;
+   }
+  // eseguo rotazione dei selezionati
+   else {
+      bool bOk = true ;
+      int nI = pGeomDB->GetFirstSelectedObj() ;
+      while ( nI != GDB_ID_NULL  &&  bOk) {
+         if ( ! pGeomDB->Rotate( nI, vPtAx, vVtAx, dAngRotDeg))
+            bOk = false ;
+         nI = pGeomDB->GetNextSelectedObj() ;
+      }
+      return ( bOk ? TRUE : FALSE) ;
+   }
 }
 
 //-------------------------------------------------------------------------------
@@ -66,8 +118,21 @@ __stdcall EgtRotateGlob( int nId, double vPtAx[3], double vVtAx[3], double dAngR
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo rotazione
-   return ( pGeomDB->RotateGlob( nId, vPtAx, vVtAx, dAngRotDeg) ? TRUE : FALSE) ;
+  // eseguo rotazione singola
+   if ( nId != GDB_ID_SEL) {
+      return ( pGeomDB->RotateGlob( nId, vPtAx, vVtAx, dAngRotDeg) ? TRUE : FALSE) ;
+   }
+  // eseguo rotazione dei selezionati
+   else {
+      bool bOk = true ;
+      int nI = pGeomDB->GetFirstSelectedObj() ;
+      while ( nI != GDB_ID_NULL  &&  bOk) {
+         if ( ! pGeomDB->RotateGlob( nI, vPtAx, vVtAx, dAngRotDeg))
+            bOk = false ;
+         nI = pGeomDB->GetNextSelectedObj() ;
+      }
+      return ( bOk ? TRUE : FALSE) ;
+   }
 }
 
 //-------------------------------------------------------------------------------
@@ -76,8 +141,21 @@ __stdcall EgtRotateGroup( int nId, double vPtAx[3], double vVtAx[3], double dAng
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo rotazione
-   return ( pGeomDB->RotateGroup( nId, vPtAx, vVtAx, dAngRotDeg) ? TRUE : FALSE) ;
+  // eseguo rotazione singola
+   if ( nId != GDB_ID_SEL) {
+      return ( pGeomDB->RotateGroup( nId, vPtAx, vVtAx, dAngRotDeg) ? TRUE : FALSE) ;
+   }
+  // eseguo rotazione dei selezionati
+   else {
+      bool bOk = true ;
+      int nI = pGeomDB->GetFirstSelectedObj() ;
+      while ( nI != GDB_ID_NULL  &&  bOk) {
+         if ( ! pGeomDB->RotateGroup( nI, vPtAx, vVtAx, dAngRotDeg))
+            bOk = false ;
+         nI = pGeomDB->GetNextSelectedObj() ;
+      }
+      return ( bOk ? TRUE : FALSE) ;
+   }
 }
 
 //-------------------------------------------------------------------------------
@@ -88,7 +166,7 @@ __stdcall EgtScale( int nId, const double vOrig[3],
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo rotazione
+  // eseguo scalatura
    Frame3d frFrame ;
    if ( ! frFrame.Set( vOrig, vX, vY, vZ))
       return FALSE ;
@@ -103,7 +181,7 @@ __stdcall EgtScaleGlob( int nId, const double vOrig[3],
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo rotazione
+  // eseguo scalatura
    Frame3d frFrame ;
    if ( ! frFrame.Set( vOrig, vX, vY, vZ))
       return FALSE ;
@@ -118,7 +196,7 @@ __stdcall EgtScaleGroup( int nId, const double vOrig[3],
 {
    IGeomDB* pGeomDB = GetCurrGeomDB() ;
    VERIFY_GEOMDB( pGeomDB, FALSE)
-  // eseguo rotazione
+  // eseguo scalatura
    Frame3d frFrame ;
    if ( ! frFrame.Set( vOrig, vX, vY, vZ))
       return FALSE ;
diff --git a/API_Scene.cpp b/API_Scene.cpp
index d2f857b..03a606e 100644
--- a/API_Scene.cpp
+++ b/API_Scene.cpp
@@ -138,7 +138,7 @@ __stdcall EgtSelect( int nWinX, int nWinY, int nSelW, int nSelH, int* pnSel)
 
 //-----------------------------------------------------------------------------
 int
-__stdcall EgtGetFirstSelectedObj( void)
+__stdcall EgtGetFirstObjInSelWin( void)
 {
    GseContext* pGseCtx = GetCurrGseContext() ;
    VERIFY_CTX_SCENE( pGseCtx, FALSE)
@@ -148,7 +148,7 @@ __stdcall EgtGetFirstSelectedObj( void)
 
 //-----------------------------------------------------------------------------
 int
-__stdcall EgtGetNextSelectedObj( void)
+__stdcall EgtGetNextObjInSelWin( void)
 {
    GseContext* pGseCtx = GetCurrGseContext() ;
    VERIFY_CTX_SCENE( pGseCtx, FALSE)
@@ -156,6 +156,36 @@ __stdcall EgtGetNextSelectedObj( void)
    return pGseCtx->m_pScene->GetNextSelectedObj() ;
 }
 
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtUnselectableRemove( int nId)
+{
+   GseContext* pGseCtx = GetCurrGseContext() ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // tolgo dai non selezionabili
+   return pGseCtx->m_pScene->UnselectableRemove( nId) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtUnselectableAdd( int nId)
+{
+   GseContext* pGseCtx = GetCurrGseContext() ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // aggiungo ai non selezionabili
+   return pGseCtx->m_pScene->UnselectableAdd( nId) ;
+}
+
+//-----------------------------------------------------------------------------
+BOOL
+__stdcall EgtUnselectableClearAll( void)
+{
+   GseContext* pGseCtx = GetCurrGseContext() ;
+   VERIFY_CTX_SCENE( pGseCtx, FALSE)
+  // cancello tutti i non selezionabili
+   return pGseCtx->m_pScene->UnselectableClearAll() ;
+}
+
 //-----------------------------------------------------------------------------
 BOOL
 __stdcall EgtGetSelectedSnapPoint( int nSnap, int nWinX, int nWinY, int nSelW, int nSelH,