+
+/*
+ * Extra window style flags (use wxWS_EX prefix to make it clear that they
+ * should be passed to wxWindow::SetExtraStyle(), not SetWindowStyle())
+ */
+
+// by default, TransferDataTo/FromWindow() only work on direct children of the
+// window (compatible behaviour), set this flag to make them recursively
+// descend into all subwindows
+#define wxWS_EX_VALIDATE_RECURSIVELY 0x00000001
+