+#define wxOK_DEFAULT 0x00000000 /* has no effect (default) */
+#define wxYES_DEFAULT 0x00000000 /* has no effect (default) */
+#define wxNO_DEFAULT 0x00000080 /* only valid with wxYES_NO */
+#define wxCANCEL_DEFAULT 0x80000000 /* only valid with wxCANCEL */