So I have a program that I have been developing for a while (for fun) on XCode written in C++ as a command line tool program. However I just recently had the idea to turn it into a Mac OSX application. The idea would be to use cocoa/objective-c to create the UI and keep the C++ backend. However, I don't know how to add this in to a project that has already been created as a command line program. Would I have to create a brand new project as a cocoa application and copy/paste my existing code over? Or is there a simpler way to achieve what it is I'm looking to do?