Blackberry OS 6 Toolbar PushScreen and PopScreen -

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i asked question before on how create toolbar, have created toolbar, , push on next screen, not sure how can remove last screen, know can use popscreen. stuck @ popping screen off in tab bar, because not know last screen may be, since can click of tabs @ top. can provide me code samples on app using tab bar adds new screen , removes last screen?

typically, want leave screens on stack, when user done whatever activity have selected, toolbar screen shown again. if know want pop current screen, can via uiapplication.getactivescreen() returns topmost screen in stack.


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