wxButton, wxCheckBox, wxSlider, wxToggleButton native implementations for PalmOS.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31589 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/palmos/toplevel.h

@@ -81,6 +81,9 @@ public:
     void SetLastFocus(wxWindow *win) { m_winLastFocused = win; }
     wxWindow *GetLastFocus() const { return m_winLastFocused; }
 
+    // interface to native frame structure
+    FormType *GetForm();
+
 protected:
     // common part of all ctors
     void Init();