just change the object property
i.e. browse bItem:title = "Hello World".
some properties can't be changed after the widget ( ui object )
has been realized, created in windows, but certainly not the title.
read up about it in the programming handbook in you e-docs
the chapter about graphical objects
if you don't already have the e-docs
you can download them off psdn.com, for free ofcourse
good luck !