diff --git a/xvaga/xvaga.cpp b/xvaga/xvaga.cpp
index 763cbaf9d..2d0134178 100755
--- a/xvaga/xvaga.cpp
+++ b/xvaga/xvaga.cpp
@@ -435,32 +435,26 @@ void xvt_app_create(int argc, char **argv, unsigned long flags,
 	wxPoint pos = wxDefaultPosition;
 	wxSize size = wxDefaultSize;
 	long style = wxDEFAULT_FRAME_STYLE;
-  bool can_change_firm = true;
+
+  wxWindow* pParent = NULL;
+  bool bHasMenu = true, bCanChangeFirm = true;
 
 #ifdef WIN32
   HWND hwndParent = (HWND)OsWin32_FindMenuContainer();
   if (hwndParent != NULL)
   {
-    can_change_firm = false;
-  
-    RECT rct; ::GetWindowRect(hwndParent, &rct);
-    if (rct.right - rct.left >= 720)
-    {
-      style = wxSYSTEM_MENU;
-      DWORD dwFlags = ::GetWindowLong(hwndParent, GWL_STYLE);
-      if (dwFlags & WS_CAPTION)
-      {
-        xvt_rect_set(&_startup_rect, rct.left, rct.top, rct.right, rct.bottom);
-        hwndParent = NULL;
-      }
-      else
-      {
-        xvt_rect_set(&_startup_rect, 0, 0, rct.right-rct.left, rct.bottom-rct.top);
-      }
-    }
+    pParent = new wxWindow;
+    pParent->AssociateHandle(hwndParent);
+    const wxSize szWin = pParent->GetSize();
+    const wxSize szCli = pParent->GetClientSize();
+    xvt_rect_set(&_startup_rect, 0, 0, szWin.x, szWin.y);
+    style = wxSYSTEM_MENU;  // Lo stile si riduce al minimo: niente cornici
+
+    bHasMenu = (szWin.y - szCli.y) < 2;
+    bCanChangeFirm = false;
   }
 #endif
-
+  
   if (_startup_rect.right > _startup_rect.left)
   {
 	  pos.x = _startup_rect.left;
@@ -487,58 +481,55 @@ void xvt_app_create(int argc, char **argv, unsigned long flags,
   _task_win->SetBackgroundStyle(wxBG_STYLE_CUSTOM); // Lo sfondo viene disegnato nella OnPaint
 	_nice_windows.Put((WINDOW)_task_win, _task_win);
 
-#ifdef WIN32
-  if (hwndParent != NULL)
+  if (pParent != NULL)
   {
-//  HWND hwndChild = (HWND)_task_win->GetHandle();
-//  ::SetParent(hwndChild, hwndParent);
-    wxWindow* padre = new wxWindow;
-    padre->AssociateHandle(hwndParent);
-    _task_win->Reparent(padre);
+    _task_win->Reparent(pParent);
+    pParent->DissociateHandle();
+    pParent = NULL;
   }
-#endif
 
-	wxMenu* Menus[3];
-	wxString Title[3];
-	Title[0] = "&File";
-  Menus[0] = new wxMenu;
-  
-  if (can_change_firm)
+  if (bHasMenu)
   {
-	  Menus[0]->Append(M_FILE_NEW, "Scelta &Ditta...");
+	  wxMenu* Menus[3];
+	  wxString Title[3];
+	  Title[0] = "&File";
+    Menus[0] = new wxMenu;
+    
+    if (bCanChangeFirm)
+    {
+	    Menus[0]->Append(M_FILE_NEW, "Scelta &Ditta...");
+	    Menus[0]->AppendSeparator();
+    }
+	  Menus[0]->Append(M_FILE_PG_SETUP, "&Impostazione Stampante...");
+	  Menus[0]->Append(M_FILE_PRINT, "&Stampa");
 	  Menus[0]->AppendSeparator();
+	  Menus[0]->Append(M_FILE_QUIT, "&Fine");
+	  Title[1] = "&Modifica";
+    Menus[1] = new wxMenu;
+	  Menus[1]->Append(M_EDIT_CUT, "&Taglia\tCtrl+X");
+	  Menus[1]->Append(M_EDIT_COPY, "&Copia\tCtrl+C");
+	  Menus[1]->Append(M_EDIT_PASTE, "&Incolla\tCtrl+V");
+	  Menus[1]->Append(M_EDIT_CLEAR, "&Elimina\tCanc");
+	  Title[2] = "&Help";
+    Menus[2] = new wxMenu;
+    Menus[2]->Append(M_HELP_CONTENTS, "&Sommario");
+    Menus[2]->Append(M_HELP_SEARCH, "&Cerca argomento");
+    Menus[2]->Append(M_HELP_HELPONHELP, "&Uso della guida");
+    Menus[2]->AppendSeparator();
+    Menus[2]->Append(M_FILE_ABOUT, "&Informazioni");
+  	
+  #ifdef WIN32
+    wxMenuBar* pMenubar = new wxMenuBar(3, Menus, Title);
+  #else
+	  wxMenuBar* pMenubar = new wxMenuBar();
+    for (int i= 0; i < 3; i++)
+      pMenubar->Append(Menus[i], Title[i]);
+  #endif
+	  _task_win->SetMenuBar(pMenubar);
   }
-	Menus[0]->Append(M_FILE_PG_SETUP, "&Impostazione Stampante...");
-	Menus[0]->Append(M_FILE_PRINT, "&Stampa");
-	Menus[0]->AppendSeparator();
-	Menus[0]->Append(M_FILE_QUIT, "&Fine");
-	Title[1] = "&Modifica";
-  Menus[1] = new wxMenu;
-	Menus[1]->Append(M_EDIT_CUT, "&Taglia\tCtrl+X");
-	Menus[1]->Append(M_EDIT_COPY, "&Copia\tCtrl+C");
-	Menus[1]->Append(M_EDIT_PASTE, "&Incolla\tCtrl+V");
-	Menus[1]->Append(M_EDIT_CLEAR, "&Elimina\tCanc");
-	Title[2] = "&Help";
-  Menus[2] = new wxMenu;
-  Menus[2]->Append(M_HELP_CONTENTS, "&Sommario");
-  Menus[2]->Append(M_HELP_SEARCH, "&Cerca argomento");
-  Menus[2]->Append(M_HELP_HELPONHELP, "&Uso della guida");
-  Menus[2]->AppendSeparator();
-  Menus[2]->Append(M_FILE_ABOUT, "&Informazioni");
-	
-#ifdef WIN32
-  wxMenuBar* pMenubar = new wxMenuBar(3, Menus, Title);
-#else
-	wxMenuBar* pMenubar = new wxMenuBar();
-
-  for (int i= 0; i < 3; i++)
-    pMenubar->Append(Menus[i], Title[i]);
-#endif
-  wxFrame* pFrame = wxStaticCast(_task_win, wxFrame);
-	pFrame->SetMenuBar(pMenubar);
-	if (style & wxMAXIMIZE)
-		pFrame->Maximize();
 
+  if (style & wxMAXIMIZE)
+		_task_win->Maximize();
   _task_win->Show();
 
   wxApp* a = wxTheApp;
@@ -3528,10 +3519,7 @@ wxThread::ExitCode TIconizeTaskThread::Entry()
 {
   ::wxMilliSleep(500);
   if (__bChildRunning) // Il programma e' ancora attivo
-  {
-    wxFrame* frame = wxStaticCast(_task_win, wxFrame);
-    frame->Iconize();
-  }
+    _task_win->Iconize();
   return 0;
 }
 
@@ -3554,7 +3542,6 @@ long xvt_sys_execute(const char* cmdline, BOOLEAN sync, BOOLEAN iconizetask)
 
   if (sync)
   {
-    wxFrame* frame = wxStaticCast(_task_win, wxFrame);
     if (iconizetask)
     {
       wxEnableTopLevelWindows(FALSE);
@@ -3564,13 +3551,13 @@ long xvt_sys_execute(const char* cmdline, BOOLEAN sync, BOOLEAN iconizetask)
       exitcode = wxExecute(cmd, wxEXEC_SYNC);
       __bChildRunning = false;
       
-      if (frame->IsIconized())
-        frame->Restore();
+      if (_task_win->IsIconized())
+        _task_win->Restore();
       wxEnableTopLevelWindows(TRUE);
     }
     else
       exitcode = wxExecute(cmd, wxEXEC_SYNC); // Valutare wxEXEC_NODISABLE
-    frame->Raise();
+    _task_win->Raise();
   }
   else
     exitcode = wxExecute(cmd, wxEXEC_ASYNC);
@@ -4189,8 +4176,8 @@ void xvt_vobj_maximize(WINDOW win)
 void xvt_vobj_minimize(WINDOW win)
 {
   wxFrame* pMain = wxDynamicCast((wxObject*)win, wxFrame);
-  if (pMain != NULL)
-    pMain->Iconize();
+  if (pMain == _task_win)
+    _task_win->Iconize();
   else
     SORRY_BOX();
 }
@@ -4470,10 +4457,7 @@ static wxStatusBar* WIN2StatBar(WINDOW win)
 {
   wxStatusBar* pStatusBar = NULL;
 	if (win == NULL_WIN || win == TASK_WIN)
-  {
-    wxFrame* w = wxStaticCast(_task_win, wxFrame);
-    pStatusBar = w->GetStatusBar();
-  }
+    pStatusBar = _task_win->GetStatusBar();
   else
     pStatusBar = wxDynamicCast((wxObject*)win, wxStatusBar);
   return pStatusBar;
@@ -4543,9 +4527,8 @@ BOOLEAN statbar_destroy(WINDOW win)
   wxStatusBar* pStatusBar = WIN2StatBar(win);
   if (pStatusBar != NULL)
   {
-    wxFrame& w = *wxStaticCast(_task_win, wxFrame);
-    if (w.GetStatusBar() == pStatusBar)
-      w.SetStatusBar(NULL);
+    if (_task_win->GetStatusBar() == pStatusBar)
+      _task_win->SetStatusBar(NULL);
     pStatusBar->Destroy();
   }
   return pStatusBar != NULL;
diff --git a/xvaga/xvt.h b/xvaga/xvt.h
index 650a133ff..98da3ed4e 100755
--- a/xvaga/xvt.h
+++ b/xvaga/xvt.h
@@ -425,6 +425,7 @@ XVTDLL void    xvt_win_trap_pointer(WINDOW win);
 XVTDLL BOOLEAN xvt_pane_add(WINDOW parent, WINDOW pane, const char* name, int dock, int flags);
 XVTDLL BOOLEAN xvt_pane_change_flags(WINDOW pane, int set, int reset);
 XVTDLL BOOLEAN xvt_pane_detach(WINDOW pane);
+XVTDLL BOOLEAN xvt_pane_set_size_range(WINDOW pane, int min_size, int max_size);
 XVTDLL BOOLEAN xvt_pane_set_title(WINDOW pane, const char* title);
 
 typedef int ODBC_CALLBACK(void*,int,char**, char**);
diff --git a/xvaga/xvtctl.cpp b/xvaga/xvtctl.cpp
index 6c93be9d8..478b69438 100755
--- a/xvaga/xvtctl.cpp
+++ b/xvaga/xvtctl.cpp
@@ -335,35 +335,43 @@ void xvt_btn_set_images(WINDOW win, XVT_IMAGE up, XVT_IMAGE down)
 // Pane interface
 ///////////////////////////////////////////////////////////
 
-BOOLEAN xvt_pane_add(WINDOW win, WINDOW pane, const char* name, int dock, int flags)
-{
-  BOOLEAN done = FALSE;
-  if (win != NULL_WIN && pane != NULL_WIN && name && *name)
-  {
-    done = ((TwxWindow*)win)->AddPane((wxWindow*)pane, name, dock, flags);
-  }
-  return done;
-}
-
 static wxAuiPaneInfo* LockPane(WINDOW win)
 {
-  wxWindow* pwin = (wxWindow*)win;
-  wxAuiManager* pManager = wxAuiManager::GetManager(pwin);
-  if (pManager != NULL)
+  if (win != NULL_WIN)
   {
-    wxAuiPaneInfo& pane = pManager->GetPane(pwin);
-    if (pane.IsOk())
-      return &pane;
+    wxWindow* pwin = wxStaticCast((wxObject*)win, wxWindow);
+    wxAuiManager* pManager = wxAuiManager::GetManager(pwin);
+    if (pManager != NULL)
+    {
+      wxAuiPaneInfo& pane = pManager->GetPane(pwin);
+      if (pane.IsOk())
+        return &pane;
+    }
   }
   return NULL;
 }
 
 static void UnlockPane(WINDOW win)
 {
-  wxWindow* pwin = (wxWindow*)win;
-  wxAuiManager* pManager = wxAuiManager::GetManager(pwin);
-  if (pManager != NULL)
-    pManager->Update();
+  if (win != NULL_WIN)
+  {
+    wxWindow* pwin = wxStaticCast((wxObject*)win, wxWindow);
+    wxAuiManager* pManager = wxAuiManager::GetManager(pwin);
+    if (pManager != NULL)
+      pManager->Update();
+  }
+}
+
+BOOLEAN xvt_pane_add(WINDOW win, WINDOW pane, const char* name, int dock, int flags)
+{
+  BOOLEAN done = FALSE;
+  if (win != NULL_WIN && pane != NULL_WIN && name && *name)
+  {
+    TwxWindow* owner = wxStaticCast((wxObject*)win, TwxWindow);
+    wxWindow*  child = wxStaticCast((wxObject*)pane, wxWindow);
+    done = owner->AddPane(child, name, dock, flags);
+  }
+  return done;
 }
 
 BOOLEAN xvt_pane_set_title(WINDOW win, const char* title)
@@ -394,7 +402,7 @@ XVTDLL BOOLEAN xvt_pane_detach(WINDOW win)
   BOOLEAN ok = FALSE;
   if (win != NULL_WIN)
   {
-    wxWindow* pwin = (wxWindow*)win;
+    wxWindow* pwin = wxStaticCast((wxObject*)win, wxWindow);
     wxAuiManager* pManager = wxAuiManager::GetManager(pwin);
     if (pManager != NULL)
     {
@@ -405,6 +413,36 @@ XVTDLL BOOLEAN xvt_pane_detach(WINDOW win)
   return ok;
 }
 
+XVTDLL BOOLEAN xvt_pane_set_size_range(WINDOW win, int min_size, int max_size)
+{
+  BOOLEAN ok = FALSE;
+  wxAuiPaneInfo* pane = LockPane(win);
+  if (pane != NULL)
+  {
+    if (min_size > 0 || max_size > 0)
+    {
+      wxSize szMin(-1, -1), szMax(-1, -1);
+      if (pane->IsTopDockable() || pane->IsBottomDockable())
+      {
+        szMin.y = min_size;
+        szMax.y = max_size;
+      }
+      else
+      {
+        szMin.x = min_size;
+        szMax.x = max_size;
+      }
+      pane->MinSize(szMin);
+      pane->BestSize(szMin);
+      pane->MaxSize(szMax);
+    }
+    pane->Resizable(min_size != max_size);
+    pane->DockFixed(min_size == max_size);
+    UnlockPane(win);
+  }
+  return ok;
+}
+
 ///////////////////////////////////////////////////////////
 // Notebook interface
 ///////////////////////////////////////////////////////////
@@ -446,7 +484,7 @@ short TwxNoteBook::AddTab(wxWindow* pPage, const wxString text, XVT_IMAGE xvt_im
 
   if (xvt_img != NULL)
   {
-    wxImage& img = *(wxImage*)xvt_img; // Piccola porcata...
+    wxImage& img = *wxStaticCast(xvt_img, wxImage);
     img.Rescale(BOOK_ICO_SIZE, BOOK_ICO_SIZE, wxIMAGE_QUALITY_HIGH);
     bmp = Image2Bitmap(xvt_img, true);
   }
diff --git a/xvaga/xvtwin.cpp b/xvaga/xvtwin.cpp
index 1e6fd8a47..9f3040b2b 100755
--- a/xvaga/xvtwin.cpp
+++ b/xvaga/xvtwin.cpp
@@ -16,7 +16,7 @@
 ///////////////////////////////////////////////////////////
 
 wxHashTable _nice_windows;
-wxWindow*   _task_win = NULL;
+wxFrame*    _task_win = NULL;
 EVENT_HANDLER _task_win_handler = NULL;
 
 wxRect NormalizeRCT(const RCT* prct)
diff --git a/xvaga/xvtwin.h b/xvaga/xvtwin.h
index 0d22b3d0f..54b3ebed1 100755
--- a/xvaga/xvtwin.h
+++ b/xvaga/xvtwin.h
@@ -228,7 +228,7 @@ wxRect NormalizeRCT(const RCT* prct);
 #endif
 
 extern wxHashTable _nice_windows;
-extern wxWindow*   _task_win;
+extern wxFrame*    _task_win;
 extern EVENT_HANDLER _task_win_handler;
 
 #endif