diff --git a/docs/changes.txt b/docs/changes.txt
index 4c145eeb69..89057a8130 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -35,6 +35,7 @@ INCOMPATIBLE CHANGES SINCE 2.6.x
 - wxGLContext class has no 1:1 coupling to a wxGLCanvas class any more.
   As a consequence, the class interface changed largely.
   Code updates, if any are required at all, are easy to accomplish though.
+- wxDialog::CreateButtonSizer() may return NULL now, please see the manual
 
 
 
diff --git a/docs/latex/wx/sizer.tex b/docs/latex/wx/sizer.tex
index 87aa48b05d..b3442af356 100644
--- a/docs/latex/wx/sizer.tex
+++ b/docs/latex/wx/sizer.tex
@@ -609,6 +609,22 @@ Sets the object of the wxSizerFlags to center itself in the area it is given.
 \helpref{wxSizerFlags::Center}{wxsizerflagscenter} for people with the other dialect of english.
 
 
+\membersection{wxSizerFlags::DoubleBorder}\label{wxsizerflagsdoubleborder}
+
+\func{wxSizerFlags\& }{DoubleBorder}{\param{int }{direction = wxALL}}
+
+Sets the border in the given \arg{direction} having twice the default border
+size.
+
+
+\membersection{wxSizerFlags::DoubleHorzBorder}\label{wxsizerflagsdoublehorzborder}
+
+\func{wxSizerFlags\& }{DoubleHorzBorder}{\void}
+
+Sets the border in left and right directions having twice the default border
+size.
+
+
 \membersection{wxSizerFlags::Expand}\label{wxsizerflagsexpand}
 
 \func{wxSizerFlags\& }{Expand}{\void}
@@ -651,3 +667,12 @@ Aligns the object to the right, shortcut for \texttt{Align(wxALIGN\_RIGHT)}
 
 \helpref{Align}{wxsizerflagsalign}
 
+
+\membersection{wxSizerFlags::TripleBorder}\label{wxsizerflagstriplebleborder}
+
+\func{wxSizerFlags\& }{TripleBorder}{\param{int }{direction = wxALL}}
+
+Sets the border in the given \arg{direction} having thrice the default border
+size.
+
+
diff --git a/include/wx/dialog.h b/include/wx/dialog.h
index 1dd7535bc0..766771c42d 100644
--- a/include/wx/dialog.h
+++ b/include/wx/dialog.h
@@ -70,10 +70,18 @@ public:
     wxSizer *CreateTextSizer( const wxString &message );
 #endif // wxUSE_STATTEXT // && wxUSE_TEXTCTRL
 
-    // places buttons into a horizontal wxBoxSizer
-    wxSizer *CreateButtonSizer( long flags,
-                                bool separated = false,
-                                wxCoord distance = 0 );
+    // returns a horizontal wxBoxSizer containing the given buttons
+    //
+    // notice that the returned sizer can be NULL if no buttons are put in the
+    // sizer (this mostly happens under smart phones and other atypical
+    // platforms which have hardware buttons replacing OK/Cancel and such)
+    wxSizer *CreateButtonSizer(long flags);
+
+    // returns the sizer containing CreateButtonSizer() below a separating
+    // static line for the platforms which use static lines for items
+    // separation (i.e. not Mac)
+    wxSizer *CreateSeparatedButtonSizer(long flags);
+
 #if wxUSE_BUTTON
     wxStdDialogButtonSizer *CreateStdDialogButtonSizer( long flags );
 #endif // wxUSE_BUTTON
diff --git a/src/common/dlgcmn.cpp b/src/common/dlgcmn.cpp
index dd09b3a322..74af36254e 100644
--- a/src/common/dlgcmn.cpp
+++ b/src/common/dlgcmn.cpp
@@ -279,80 +279,62 @@ Wrap(int width)
 
 #endif // wxUSE_STATTEXT
 
-wxSizer *wxDialogBase::CreateButtonSizer( long flags, bool separated, wxCoord distance )
+wxSizer *wxDialogBase::CreateButtonSizer(long flags)
 {
+    wxSizer *sizer = NULL;
+
 #ifdef __SMARTPHONE__
-    wxUnusedVar(separated);
-    wxUnusedVar(distance);
-
     wxDialog* dialog = (wxDialog*) this;
-    if (flags & wxOK){
+    if ( flags & wxOK )
         dialog->SetLeftMenu(wxID_OK);
-    }
 
-    if (flags & wxCANCEL){
+    if ( flags & wxCANCEL )
         dialog->SetRightMenu(wxID_CANCEL);
-    }
 
-    if (flags & wxYES){
+    if ( flags & wxYES )
         dialog->SetLeftMenu(wxID_YES);
-    }
-
-    if (flags & wxNO){
-        dialog->SetLeftMenu(wxID_NO);
-    }
-    wxBoxSizer* sizer = new wxBoxSizer(wxHORIZONTAL);
-    return sizer;
 
+    if ( flags & wxNO )
+        dialog->SetRightMenu(wxID_NO);
 #else // !__SMARTPHONE__
 
-#ifdef __POCKETPC__
-    // PocketPC guidelines recommend for Ok/Cancel dialogs to use
-    // OK button located inside caption bar and implement Cancel functionality
-    // through Undo outside dialog. As native behaviour this will be default
-    // here but can be easily replaced with real wxButtons
-    // with "wince.dialog.real-ok-cancel" option set to 1
-    if ( ((flags & ~(wxCANCEL|wxNO_DEFAULT))== wxOK) &&
-         (wxSystemOptions::GetOptionInt(wxT("wince.dialog.real-ok-cancel"))==0)
-       )
-    {
-        wxBoxSizer* sizer = new wxBoxSizer(wxHORIZONTAL);
-        return sizer;
-    }
-#endif // __POCKETPC__
-
 #if wxUSE_BUTTON
 
-    wxSizer* buttonSizer = CreateStdDialogButtonSizer( flags );
-
-    // Mac Human Interface Guidelines recommend not to use static lines as grouping elements
-#if wxUSE_STATLINE && !defined(__WXMAC__)
-    if(!separated)
-        return buttonSizer;
-
-    wxBoxSizer *topsizer = new wxBoxSizer( wxVERTICAL );
-    topsizer->Add( new wxStaticLine( this, wxID_ANY ), 0, wxEXPAND | wxBOTTOM, distance );
-    topsizer->Add( buttonSizer, 0, wxEXPAND );
-    return topsizer;
-
-#else // !wxUSE_STATLINE
-
-    wxUnusedVar(separated);
-    wxUnusedVar(distance);
-    return buttonSizer;
-
-#endif // wxUSE_STATLINE/!wxUSE_STATLINE
-
-#else // !wxUSE_BUTTON
-
-    wxUnusedVar(separated);
-    wxUnusedVar(distance);
-    wxBoxSizer* sizer = new wxBoxSizer(wxHORIZONTAL);
-    return sizer;
-
-#endif // wxUSE_BUTTON/!wxUSE_BUTTON
+#ifdef __POCKETPC__
+    // PocketPC guidelines recommend for Ok/Cancel dialogs to use OK button
+    // located inside caption bar and implement Cancel functionality through
+    // Undo outside dialog. As native behaviour this will be default here but
+    // can be replaced with real wxButtons by setting the option below to 1
+    if ( (flags & ~(wxCANCEL|wxNO_DEFAULT)) != wxOK ||
+            wxSystemOptions::GetOptionInt(wxT("wince.dialog.real-ok-cancel")) )
+#endif // __POCKETPC__
+    {
+        sizer = CreateStdDialogButtonSizer(flags);
+    }
+#endif // wxUSE_BUTTON
 
 #endif // __SMARTPHONE__/!__SMARTPHONE__
+
+    return sizer;
+}
+
+wxSizer *wxDialogBase::CreateSeparatedButtonSizer(long flags)
+{
+    wxSizer *sizer = CreateButtonSizer(flags);
+    if ( !sizer )
+        return NULL;
+
+    // Mac Human Interface Guidelines recommend not to use static lines as
+    // grouping elements
+#if wxUSE_STATLINE && !defined(__WXMAC__)
+    wxBoxSizer *topsizer = new wxBoxSizer(wxVERTICAL);
+    topsizer->Add(new wxStaticLine(this),
+                   wxSizerFlags().Expand().DoubleBorder(wxBOTTOM));
+    topsizer->Add(sizer, wxSizerFlags().Expand());
+    sizer = topsizer;
+#endif // wxUSE_STATLINE
+
+    return sizer;
 }
 
 #if wxUSE_BUTTON
@@ -365,27 +347,32 @@ wxStdDialogButtonSizer *wxDialogBase::CreateStdDialogButtonSizer( long flags )
     wxButton *yes = NULL;
     wxButton *no = NULL;
 
-    if (flags & wxOK){
+    if (flags & wxOK)
+    {
         ok = new wxButton(this, wxID_OK);
         sizer->AddButton(ok);
     }
 
-    if (flags & wxCANCEL){
+    if (flags & wxCANCEL)
+    {
         wxButton *cancel = new wxButton(this, wxID_CANCEL);
         sizer->AddButton(cancel);
     }
 
-    if (flags & wxYES){
+    if (flags & wxYES)
+    {
         yes = new wxButton(this, wxID_YES);
         sizer->AddButton(yes);
     }
 
-    if (flags & wxNO){
+    if (flags & wxNO)
+    {
         no = new wxButton(this, wxID_NO);
         sizer->AddButton(no);
     }
 
-    if (flags & wxHELP){
+    if (flags & wxHELP)
+    {
         wxButton *help = new wxButton(this, wxID_HELP);
         sizer->AddButton(help);
     }