DPR - Delphi Project is a file extension for project files in which they are designed by Delphi. They are often used for making up different Windows programs. This file extension can also be used as a main source code file that is the entry way for the application. This extension can be used for different source codes as well that are within the project. It comes with many benefits that you can take advantage of right away. There are different types of DPROJ files in which you will be able to switch up the settings and do a little bit more with.