diff --git a/include/mask.h b/include/mask.h
index edfbb89f0..e5c55dc88 100755
--- a/include/mask.h
+++ b/include/mask.h
@@ -325,7 +325,7 @@ public:
   // @cmember Ritorna il primo campo dirty
   short dirty() const;
   
-  // @cmember Setta lo sheet che gestisce la maschera
+  // @cmember Setta lo sheet di cui la maschera gestisce le righe
   void set_sheet(TSheet_field* s) 
   { _sheet = s; }
   
diff --git a/include/msksheet.cpp b/include/msksheet.cpp
index a60918dd0..2a9c37344 100755
--- a/include/msksheet.cpp
+++ b/include/msksheet.cpp
@@ -174,8 +174,8 @@ public:
   bool cell_disabled(int row, int column) const;
 
   // @cmember Ritorna la maschera che appartiene allo spreadsheet
-  TMask& sheet_mask()
-  { return _mask; }
+  TMask& sheet_mask() const;
+
   // @cmember Ritorna la maschera cui appartiene lo spreadsheet
   TMask& mask() const;
   
@@ -265,7 +265,7 @@ TSpreadsheet::TSpreadsheet(
 
   init();
   
-  _mask.set_sheet(o);
+  sheet_mask().set_sheet(o);
   
   // Calcolo larghezza massima tabella
 
@@ -358,7 +358,7 @@ TSpreadsheet::TSpreadsheet(
   listdef->v.list->white_space_color = MASK_DARK_COLOR;
   
   word attr = XI_ATR_RJUST;                                            
-  if (_mask.id2pos(FIRST_FIELD -1) != -1)
+  if (sheet_mask().id2pos(FIRST_FIELD -1) != -1)
     attr |= XI_ATR_SELECTABLE;                         
   
   XI_OBJ_DEF* coldef = xi_add_column_def(listdef, 0, attr, 0, NUMBER_WIDTH, NUMBER_WIDTH, 
@@ -430,9 +430,18 @@ TSpreadsheet::TSpreadsheet(
 
 TSpreadsheet::~TSpreadsheet() 
 {                    
+  if (_getmask != NULL)
+    _getmask(0, _mask, TRUE);   // Distrugge la maschera customizzata
+    
   set_win(NULL_WIN); 
 }             
 
+TMask& TSpreadsheet::sheet_mask() const
+{          
+  TMask& m = ((TSpreadsheet*)this)->_mask;
+  return (_getmask != NULL) ? *_getmask((int)_cur_rec, m, FALSE ) : m;
+}                                  
+ 
 
 // Converts a row number in the correspondig record number
 int TSpreadsheet::row2rec(int& row)
@@ -629,8 +638,6 @@ bool TSpreadsheet::destroy(
   if (ok && mask().is_running()) 
     update(-1);
 
-  // Notifica l'avvenuta cancellazione
-  notify( rec, K_CTRL + K_DEL );
   indestroy = FALSE;
   return ok;
 }
@@ -808,13 +815,13 @@ void TSpreadsheet::list_handler(XI_EVENT *xiev)
         update(_cur_rec);            // Forces update delayed by str2mask
       }
       
-      if (_mask.id2pos(FIRST_FIELD-1) != -1)
+      if (sheet_mask().id2pos(FIRST_FIELD-1) != -1)
       {
-        TMask_field& button = _mask.field(FIRST_FIELD-1);  
+        TMask_field& button = sheet_mask().field(FIRST_FIELD-1);  
         if (button.active())
         {
           button.on_hit();   
-          if (_mask.dirty())
+          if (sheet_mask().dirty())
           { 
             notify_change();
             mask2str(_cur_rec);
@@ -1010,7 +1017,7 @@ void TSpreadsheet::list_handler(XI_EVENT *xiev)
             const bool ok = _edit_field->on_key(k);
             if (!ok && k == K_F9)                               // Ricerca non completata?
             {
-              _edit_field = &_mask.fld(_mask.focus_field());
+              _edit_field = &sheet_mask().fld(sheet_mask().focus_field());
               const short foca = _edit_field->dlg();
               const int col = (foca - FIRST_FIELD) % 100 +1;
               if (col > 0 && col != _cur_col)                   // Ricerca alternativa
@@ -1176,7 +1183,7 @@ TSpreadsheet::TSpreadsheet(short x, short y, short dx, short dy,
 : TArray_sheet(x, y, dx, dy, maskname, head, 0, parent), _owner(o),
   _mask(maskname, maskno), _notify(NULL), /* Matteo */ _getmask( NULL )
 {
-  _mask.set_sheet(o);
+  sheet_mask().set_sheet(o);
 }
 
 bool TSpreadsheet::on_key(KEY k)
@@ -1247,8 +1254,8 @@ TMask& TSpreadsheet::mask() const
 // Ritorna il campo con l'identificatore dato della maschera dello sheet
 TMask_field* TSpreadsheet::field(short id) const
 {
-  const int pos = _mask.id2pos(id);
-  return pos < 0 ? NULL : &_mask.fld(pos);
+  const int pos = sheet_mask().id2pos(id);
+  return pos < 0 ? NULL : &sheet_mask().fld(pos);
 }
 
 
@@ -1612,7 +1619,8 @@ KEY TSpreadsheet::edit(int n, KEY tasto)
         destroy(n);
         if (n < items())
           str2mask(n);
-      }  
+        notify(n, K_CTRL+K_DEL);        // Notifica l'avvenuta cancellazione
+      }           
     } 
     else
       if (k == K_ESC)