TortoiseBZR Screen Shots
These screen-shots may be out-of-date, but should give you a general idea
Tortoise adds a number of Bazaar related items to the Windows Explorer Context Menu. It uses a single process to interact with bazaar - a taskbar icon is created when this process is running:
Tortoise Bazaar leans on the QBzr plugin for most of its dialogs; shown below are the dialogs for creating a new working tree and updating it.
We have popup help for various topics - here is the 'qinit' command after clicking the repository formats link.
Tortoise has a few custom dialogs though - below are the 'Settings' and 'About' dialogs.