[Gambas-user] Using masks

[M. Cs.]

I want to enhance the look of my application. I need some instructions about
the masks. I have some ideas, but need confirmation.
1. So if I have a form sized 1024x768, and I want to create skins for it,
I'll have to create a same sized .png image with transparent areas over the
text boxes, buttons and other components?
2. How to use the mask, let say, the .png "skin.png"?