It's the equivalent of a frame in visual basic and whats called a groupbox in vb.net/c++. Think of them as containers that you parent other objects to. It can be useful in many situations, deleting groups of child gadgets by deleting the parent panel for instance. BB panels have a style property of raised/sunken and they can also be assigned images with SetPanelImage.
I always inset my canvas in a sunken panel for games because of its better appearance.
I always inset my canvas in a sunken panel for games because of its better appearance.