+#include "wx/treebase.h"
+
+// ----------------------------------------------------------------------------
+// include the platform-dependent wxTreeCtrl class
+// ----------------------------------------------------------------------------
+
+#if defined(__WXUNIVERSAL__)
+ #include "wx/generic/treectlg.h"
+#elif defined(__WXPALMOS__)
+ #include "wx/palmos/treectrl.h"
+#elif defined(__WXMSW__)
+ #include "wx/msw/treectrl.h"