To help dyslexics read a document on their computer screens, I'm writing a program to isolate words and phrases in a moveable, resizeable rectangle to make the letters stay put. Should I use the graphics header file to include a function to draw the rectangle or is there a better way to do that?

I'm eager to hear your thoughts about any aspect of the project, especially the hardest one, making to pogram with with many document formats. But since I still need to invent an algorthim, I'm ignoring, say, what data structures to choose. The more thoroughly I plan the project, the better it'll go. The sooner I code, the more bugs I'll need to squash.

Thank you for your help.