Each tuner card by various manufacturers and verying models will have it's own applications for setup configuration, viewing, personal video recorder as well as timer with some like a vcr, and may include a dvd program as well. The player/tv channel portion of the software will have a hardware configuration as well as input scan for analog, digital tv, internet radio with some, and the options for s-video and composite input.
The main viewer will much more like you would see in WMP or PowerDVD and not something you extend like a desktop between two monitors or 1 monitor, 1 tv. When selecting full screen viewing and with most simply double clicking on the viewing screen portion it will maximise out to full screen viewing just as seen with other players.