/////////////////////////////////////////////////////////////////////////////
-// Name:        button.cpp
+// Name:        src/os2/button.cpp
 // Purpose:     wxButton
 // Author:      David Webster
 // Modified by:
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
+#include "wx/button.h"
+
 #ifndef WX_PRECOMP
     #include "wx/app.h"
-    #include "wx/button.h"
     #include "wx/brush.h"
     #include "wx/panel.h"
     #include "wx/bmpbuttn.h"
     #include "wx/settings.h"
     #include "wx/dcscreen.h"
     #include "wx/scrolwin.h"
+    #include "wx/toplevel.h"
 #endif
 
 #include "wx/stockitem.h"
 
 // Button
 
-bool wxButton::Create(
-  wxWindow*                         pParent
-, wxWindowID                        vId
-, const wxString&                   rsLbl
-, const wxPoint&                    rPos
-, const wxSize&                     rSize
-, long                              lStyle
-, const wxValidator&                rValidator
-, const wxString&                   rsName
-)
+bool wxButton::Create( wxWindow*          pParent,
+                       wxWindowID         vId,
+                       const wxString&    rsLbl,
+                       const wxPoint&     rPos,
+                       const wxSize&      rSize,
+                       long               lStyle,
+                       const wxValidator& rValidator,
+                       const wxString&    rsName)
 {
     wxString rsLabel(rsLbl);
     if (rsLabel.empty() && wxIsStockID(vId))
                                       );
     if (m_hWnd == 0)
     {
-        return FALSE;
+        return false;
     }
 
     //
             ,rSize.y
            );
     delete pButtonFont;
-    return TRUE;
+    return true;
 } // end of wxButton::Create
 
 wxButton::~wxButton()
 {
-    wxPanel*                        pPanel = wxDynamicCast(GetParent(), wxPanel);
+    wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 
-    if (pPanel)
+    if (tlw)
     {
-        if (pPanel->GetDefaultItem() == this)
+        if (tlw->GetDefaultItem() == this)
         {
             //
             // Don't leave the panel with invalid default item
             //
-            pPanel->SetDefaultItem(NULL);
+            tlw->SetDefaultItem(NULL);
         }
     }
 } // end of wxButton::~wxButton
 
 void wxButton::SetDefault()
 {
-    wxWindow*                       pParent = GetParent();
+    wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 
-    wxCHECK_RET( pParent, _T("button without parent?") );
+    wxCHECK_RET( tlw, _T("button without top level window?") );
 
     //
     // Set this one as the default button both for wxWidgets and Windows
     //
-    wxWindow*                       pWinOldDefault = pParent->SetDefaultItem(this);
-
-    SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton)
-                    ,FALSE
-                   );
-    SetDefaultStyle( this
-                    ,TRUE
-                   );
+    wxWindow*                       pWinOldDefault = tlw->SetDefaultItem(this);
+
+    SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton), false);
+    SetDefaultStyle( this, true );
 } // end of wxButton::SetDefault
 
 void wxButton::SetTmpDefault()
 {
-    wxWindow*                       pParent = GetParent();
+    wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 
-    wxCHECK_RET( pParent, _T("button without parent?") );
+    wxCHECK_RET( tlw, _T("button without top level window?") );
 
-    wxWindow*                       pWinOldDefault = pParent->GetDefaultItem();
+    wxWindow*                       pWinOldDefault = tlw->GetDefaultItem();
 
-    pParent->SetTmpDefaultItem(this);
-    SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton)
-                    ,FALSE
-                   );
-    SetDefaultStyle( this
-                    ,TRUE
-                   );
+    tlw->SetTmpDefaultItem(this);
+    SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton), false);
+    SetDefaultStyle( this, true );
 } // end of wxButton::SetTmpDefault
 
 void wxButton::UnsetTmpDefault()
 {
-    wxWindow*                       pParent = GetParent();
+    wxTopLevelWindow *tlw = wxDynamicCast(wxGetTopLevelParent(this), wxTopLevelWindow);
 
-    wxCHECK_RET( pParent, _T("button without parent?") );
+    wxCHECK_RET( tlw, _T("button without top level window?") );
 
-    pParent->SetTmpDefaultItem(NULL);
+    tlw->SetTmpDefaultItem(NULL);
 
-    wxWindow*                       pWinOldDefault = pParent->GetDefaultItem();
+    wxWindow*                       pWinOldDefault = tlw->GetDefaultItem();
 
-    SetDefaultStyle( this
-                    ,FALSE
-                   );
-    SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton)
-                    ,TRUE
-                   );
+    SetDefaultStyle( this, false );
+    SetDefaultStyle( wxDynamicCast(pWinOldDefault, wxButton), true );
 } // end of wxButton::UnsetTmpDefault
 
 void wxButton::SetDefaultStyle(
 // event/message handlers
 // ----------------------------------------------------------------------------
 
-bool wxButton::OS2Command(
-  WXUINT                            uParam
-, WXWORD                            wId
-)
+bool wxButton::OS2Command(WXUINT uParam, WXWORD WXUNUSED(wId))
 {
-    bool                            bProcessed = FALSE;
+    bool bProcessed = false;
 
     switch (uParam)
     {
             bProcessed = SendClickEvent();
             break;
     }
+
     return bProcessed;
 } // end of wxButton::OS2Command
 
-WXHBRUSH wxButton::OnCtlColor(
-  WXHDC                             pDC
-, WXHWND                            pWnd
-, WXUINT                            nCtlColor
-, WXUINT                            uMessage
-, WXWPARAM                          wParam
-, WXLPARAM                          lParam
-)
+WXHBRUSH wxButton::OnCtlColor( WXHDC    WXUNUSED(pDC),
+                               WXHWND   WXUNUSED(pWnd),
+                               WXUINT   WXUNUSED(nCtlColor),
+                               WXUINT   WXUNUSED(uMessage),
+                               WXWPARAM WXUNUSED(wParam),
+                               WXLPARAM WXUNUSED(lParam) )
 {
-    wxBrush*                        pBackgroundBrush = wxTheBrushList->FindOrCreateBrush( GetBackgroundColour()
-                                                                                         ,wxSOLID
-                                                                                        );
+    wxBrush* pBackgroundBrush = wxTheBrushList->FindOrCreateBrush( GetBackgroundColour()
+                                                                  ,wxSOLID
+                                                                  );
 
     return (WXHBRUSH)pBackgroundBrush->GetResourceHandle();
 } // end of wxButton::OnCtlColor
     return dwStyle;
 } // end of wxButton::OS2GetStyle
 
-MRESULT wxButton::WindowProc(
-  WXUINT                            uMsg
-, WXWPARAM                          wParam
-, WXLPARAM                          lParam
-)
+MRESULT wxButton::WindowProc( WXUINT   uMsg,
+                              WXWPARAM wParam,
+                              WXLPARAM lParam )
 {
     //
     // When we receive focus, we want to temporary become the default button in
                                      ,lParam
                                     ));
 } // end of wxWindowProc
-