Request to SC team: custom form for calendar

AFAIK, if I have data that is used in the calendar and has to be accessible from a grid, I need to design a separate form if I want to be able to edit the data from the grid.

It would be more efficient and less time wasting if I could either use a custom form with the calendar, i.e. over ride its (internal) form, or better still, that the calendar’s form could be called from another (grid) application.

Thanks