/** Indicates the bit useable by derived properties.
*/
-wxPG_PROP_CLASS_SPECIFIC_2 = 0x00100000
+wxPG_PROP_CLASS_SPECIFIC_2 = 0x00100000,
+
+/** Indicates that the property is being deleted and should be ignored.
+*/
+wxPG_PROP_BEING_DELETED = 0x00200000
};