WinRunner Question:

We can handle varying window labels using regular expressions. WinRunner uses two hidden properties in order to use regular expression in an object’s physical description. These properties are regexp_label and regexp_MSW_class.
i. The regexp_label property is used for windows only. It operates behind the scenes to insert a regular expression into a window’s label description.
ii. The regexp_MSW_class property inserts a regular expression into an object’s MSW_class. It is obligatory for all types of windows and for the object class object.