diff --git a/src/include/mask.cpp b/src/include/mask.cpp
index 8e08984e3..b0781d46f 100755
--- a/src/include/mask.cpp
+++ b/src/include/mask.cpp
@@ -2810,6 +2810,17 @@ KEY TMask::check_mask()
 	return stop_run(K_ENTER) ? K_ENTER : K_ESC;
 }
 
+// @cmember ritorna la posizione del primo campo di una cella di uno sheet
+int TMask::first_cell_fldpos(int & cid)
+{
+  return id2pos(cid = first_cell_id(cid));
+}
+
+// @cmember ritorna la posizione del campo successivo di una cella di uno sheet
+int TMask::next_cell_fldpos(int & cid)
+
+{  return id2pos(cid = next_cell_id(cid)); }
+
 // @doc INTERNAL
 
 // @mfunc costruttore di copia
diff --git a/src/include/mask.h b/src/include/mask.h
index 3e4db8ea0..c22248aa3 100755
--- a/src/include/mask.h
+++ b/src/include/mask.h
@@ -508,8 +508,12 @@ public:
   { return _toolwin; }
   WINDOW toolbar() const
   { return _toolbar; }
-  // @cmember verifica la mascher senza eseguirla
+  // @cmember verifica la maschera senza eseguirla
 	KEY check_mask();
+  // @cmember ritorna la posizione del primo campo di una cella di uno sheet
+  int first_cell_fldpos(int & cid);
+  // @cmember ritorna la posizione del campo successivo di una cella di uno sheet
+  int next_cell_fldpos(int & cid);
 };
 
 // @doc EXTERNAL
diff --git a/src/include/maskfld.cpp b/src/include/maskfld.cpp
index d3c029030..aefa3f9a2 100755
--- a/src/include/maskfld.cpp
+++ b/src/include/maskfld.cpp
@@ -581,7 +581,17 @@ void TMask_field::show(
         const int nrow = s->selected();
 
         if (nrow >= 0 && nrow < s->items() && s->exist_column(dlg()))
+        {
+          int id = dlg();
+
+          for (int pos = mask().first_cell_fldpos(id); pos >= 0; pos = mask().next_cell_fldpos(id))
+            if (mask().fld(pos).shown())
+            {
+              on = true;
+              break;
+            }
           s->enable_cell(nrow, dlg(), on);
+        }
       }
     }
 #ifdef DBG
diff --git a/src/include/msksheet.cpp b/src/include/msksheet.cpp
index cc8abda5f..93b018664 100755
--- a/src/include/msksheet.cpp
+++ b/src/include/msksheet.cpp
@@ -23,6 +23,17 @@ int cid2index(short cid)
 	return xvtil_cid2index(cid);
 }
 
+int first_cell_id(const int cid)
+{
+  return xvtil_first_cell_id(cid);
+}
+
+int next_cell_id(const int cid)
+{
+  return xvtil_next_cell_id(cid);
+}
+
+
 class TCell_property : public TObject
 {
   COLOR _back, _fore; 
@@ -2201,7 +2212,7 @@ void TSpreadsheet::enable_cell(
 {
   if (column >= FIRST_FIELD)
     column = cid2index(column);
-  
+
   TRow_property* prop = get_property(row);
   if (prop == NULL)
   {
@@ -3453,6 +3464,9 @@ bool TSheet_field::cell_enabled(int row, int column) const
 void TSheet_field::show_column(int col, bool on) const
 {
   TSpreadsheet* s = (TSpreadsheet*)_ctl;
+
+  if (col >= FIRST_FIELD)
+    col = cid2index(col);
   s->show_column(col, on);
 }
 
diff --git a/src/include/msksheet.h b/src/include/msksheet.h
index 6eb98ca88..e4821979a 100755
--- a/src/include/msksheet.h
+++ b/src/include/msksheet.h
@@ -37,6 +37,9 @@ typedef bool (*SPREADSHEET_NOTIFY)(TSheet_field& s, int r, KEY k);
 typedef void (*SHEET_USERGETPUT)(TSheet_field &fld_righe, int item);
 
 int cid2index(short cid);
+int first_cell_id(const int cid);
+int next_cell_id(const int cid);
+
 // @doc EXTERNAL
 
 // @class TSheet_field | Classe per la gestione dei campi di uno spreadsheet
diff --git a/src/include/strings.cpp b/src/include/strings.cpp
index 8ac261063..7e6278010 100755
--- a/src/include/strings.cpp
+++ b/src/include/strings.cpp
@@ -243,7 +243,6 @@ bool TString::full() const
     if (!is_space(*s)) 
       return true;
   return false;
-
 }
 
 TString& TString::strip_spaces()
diff --git a/src/include/tree.cpp b/src/include/tree.cpp
index 4a7066b8f..b3e408284 100755
--- a/src/include/tree.cpp
+++ b/src/include/tree.cpp
@@ -851,4 +851,3 @@ bool TString_tree::get_description(TString& str) const
     str.cut(0);
   return obj != NULL;
 }
-
diff --git a/src/include/xvtility.cpp b/src/include/xvtility.cpp
index 5ea294f25..64158bece 100755
--- a/src/include/xvtility.cpp
+++ b/src/include/xvtility.cpp
@@ -848,3 +848,15 @@ int xvtil_cid2index(const int cid)
 		CHECKD(cid >= FIRST_FIELD, "Bad column id ", cid);
 		return (cid % 100) - 1;
 }
+
+int xvtil_first_cell_id(const int cid)
+{
+  CHECKD(cid >= FIRST_FIELD, "Bad column id ", cid);
+  return (cid % 100) + 100;
+}
+
+int xvtil_next_cell_id(const int cid)
+{
+  CHECKD(cid >= FIRST_FIELD, "Bad column id ", cid);
+  return cid + 100;
+}
\ No newline at end of file
diff --git a/src/include/xvtility.h b/src/include/xvtility.h
index f559879ed..2a83146f3 100755
--- a/src/include/xvtility.h
+++ b/src/include/xvtility.h
@@ -46,6 +46,8 @@ bool xvtil_popup_error(const char* msg);
 bool xvtil_system_error(unsigned long lasterror, ...);
 
 int xvtil_cid2index(const int cid);
+int xvtil_first_cell_id(const int cid);
+int xvtil_next_cell_id(const int cid);
 
 void beep(int severity = 0);
 void do_events();