Delphi perfection classic-Chapter 4 (Chapter 3)

 

1. Delphi project file extension

Extension		File type and description	Creation Time		Compile required?
. BPL		Borland package Library: a file containing VCL components used in the Delphi environment design or application program running.	Compile: Link		It is required to publish software packages to other Delphi program developers or end users.
. DPR .~ DPR	Delphi project file Delphi project file (. DPR) backup		Development Development	Yes No. When a new version of a project file is saved, the file is automatically generated.
. DCU     . DFM     .~ DFM     . Pas     ~. PAS   . DDP .~ DDP	Delphi compilation unit: the compilation result of a Pascal File   Delphi Form file: a binary file used to describe a form (or a data module) and its attributes. Delphi Form file (DFM) backup     Pascal file: source code of a Pascal unit. It can be a Unit related to a form or an independent unit. (. Pas) backup file   Used in the icon view of the Editor (. DDP) backup file		Compile     Development     Development     Development     Development   Development	It is only required when the source code cannot be used. The DCU file is an intermediate step for writing units, so it can speed up compilation. Yes. Each form is stored in the PAS and DFM files at the same time.   No. This file is created only when a new version of the Unit related to the form and form files is saved. Yes     No. When the new version of the source code is saved Automatic Delphi generation No A form with a form requires these seven files

Ii. Project program structure

3. Unit program structure