What is a dpr file and how do I open a dpr file?
DPR is a project file created by Delphi, a software IDE often used for building Windows applications. It is used as the main source code file that is the entry point for the application; may contain references to other source code files in the project. DPR files are written in Object Pascal, a variant of the Pascal language used by Delphi products.
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How to open dpr file on Wikipedia
How to open dpr file on Microsoft.com