Hi Alex,
The use case is to be able to create some custom control in the goal to
present them in the menu for the creator of forms, those controls have
already been configured with some rest services behind that will populate
them with the corresponding data when the end user will fill those forms.
The kind of control will be text field, date field, drop down, some graph,
may be specific control to draw on image like the one you already used
wpaint but may be other one more sophisticated.
Thanks,