Forms

This entity is similar to Frames, only it has its own wrapper that allows opening several forms simultaneously, minimizing them to a dock, scaling, and moving them.

In fact, Frames grew out of Forms, not the other way around. Frames received more specific capabilities, and now the scenario for using forms is often such that a frame is simply placed in their layout, which already contains all the logic. However, this is not mandatory, and if nothing special is needed, most of the functionality works in forms just as it does in frames.