Broken screw. cant get it out.

I need any tips from you guys on how to get a broken screw out. On my 64 convertible, were the sunvisor mounts to the top of the window frame i noticed a broken screw. Theres not really much to grab onto to turn it out. Anyone got any tips on getting it out. I found the head of the screw and was thinking about super glueing it on and trying to back it out with it glued together, but my guess is itll just brake back off. Thanks for any tips