How do I cast spells/repair items?

[dermokichwa]

I know, I know, incredibly lame question, eh?

But I just found my old Diablo disks after moving and have not yet come across the manual and even after much button hitting and pointing and clicking, I cannot figure out how to cast spells or repair items!!

Scrolls I can use. But casting a spell from my spell list is still escaping me.

Thanks!!!