How to programmatically get the resolution of a window and that of the system in Linux?

Question

I\'m trying to get the resolution of the screen as well as the resolution of a specific window (in which a program is running) on Linux system. I don\'t need to modify the resol

Answer 1

The command line tool xdpyinfo provides this information for you; to do it programmatically you need to to use Xlib, as Andrew Y explains.