I'm wondering if it's possible to do the following.

The system I am (trying) to develop requires, as much as possible, to reduce errors.

What I want to do is have a text box that states what the last action by the user was and also a text box that gives instructions for cells, objects etc when the mouse hovers over that particular item.

I know it's going to be a hard job, but can it be done and if so how?