During recording, if QuickTest is unable to uniquely 
identify a browser object based solely on its test object 
description, it assigns a value to the CreationTime test 
object property. This value indicates the order in which 
the browser was opened relative to other open browsers with 
an otherwise identical description. 
During the run session, if QuickTest is unable to identify 
a browser object based solely on its test object 
description, it examines the order in which the browsers 
were opened, and then uses the CreationTime property to 
identify the correct one. 

For example, if you record a test or component on three 
otherwise identical browsers, opened at 9:01 pm, 9:03 pm, 
and 9:05 pm, QuickTest assigns the CreationTime values 0 to 
the 9:01 pm browser, 1 to the 9:03 pm browser, and 2 to the 
9:05 pm browser. 

At 10:30 pm, when you rerun your test or component, suppose 
the browsers are opened at 10:31 pm, 10:33 pm, and 10:34 
pm. QuickTest identifies the 10:31 pm browser with the 
browser test object with CreationTime = 0, the 10:33 pm 
browser with the test object with CreationTime = 1, and the 
10:34 pm browser with the test object with CreationTime = 
2. 


Ref QTP help for more details