vb.net desktop app zoom feature

Question

In an existing vb.net 2010 desktop application, I have users that would like all the screens to be larger since some of them say the cannot see the screens.

Thus is there something like a 'zoom' enlarge feature that can be added to the application without having to enlarge all the screens in the application? If so, can you tell me how to accomplish this goal?

If not, would you tell me that also?