Added zillions of #if wxUSE_XXX

Removed cmndlgs usage of wxSizer and constraints
  Changed occurences of wxConv_xxx to wxConvXxxx and
    changed some wxConvLibc to wxConvCurrent
  Added Unicode tests to typetests (not finished)
  Compile fix for wxString in Unicode mode - we have
   to use the "experimental" printf then, I guess.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2794 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/checkbox.h

@@ -16,6 +16,9 @@
 #endif
 
 #include "wx/defs.h"
+
+#if wxUSE_CHECKBOX
+
 #include "wx/object.h"
 #include "wx/list.h"
 #include "wx/control.h"
@@ -73,4 +76,6 @@ public:
     GtkWidget *m_widgetLabel;
 };
 
+#endif
+
 #endif // __GTKCHECKBOXH__