Method for allowing invariant identification of selected objects displayed during the execution of an object oriented application, by another application. According to the proposed method, a tag generator is determined, for uniquely tagging each of the selected objects and then the tag generator generates a plurality of different and unique tags. Access of object generating functions in the source code of the application, to a collection of different and unique tags is established. A unique tag from that collection is automatically attached to the object, such that the attached tag is added to the attributes of the selected object, whenever a selected object that should be invariantly identified is generated during the execution of the application. This way, the another application is allowed to identify and access one or more objects through an interface of the application, according to their corresponding unique tags, which are invariant across all application invocations and updates.