Please expalin WinRunner architecture?

hi

In WinRunner Architecture there are 3 stages.

stage 1:- WinRunner:-  It contains the test script allows to execute the operations on the application objects to perform a navigation flow or to verify an object property or its value or reports an output or performs perameterization.

stage 2:- GUI Map :- It is internal component of WinRunner contains a list of application objects to be verify. it works like as an interface between application and test script. It displays the object of the application in hyrarichal architecture by showing its represent icon along with its physical description (logical name,class name) and also list of properties.

stage 3:- Application :- Application under testing contains the objects and operation to be verify.

if anything wrong in this answer let me know please.

Thank you.

vamsi