In my first job, in the mid 90s we were told there was going to be a photoshoot to for a brochure demonstrating all that the company had to offer.
This included someone using our software. Not the tried and tested DOS version but the whizzy new Windows version. Except there was barely an object model built, let alone a user interface.
So we drew one. In Paint. And displayed it full screen.
We must have done a reasonable job, because the boss was quite surprised when he tried clicking on it. And it made it into the brochure.