Delphi Language Learning 1-program and unit

1. Modules and procedures (units and programs)

1) Programs

Program Editor;
  Uses Forms, reabout,//an "about" box
       remain;         Main form
  {$R *.res}
  Begin
   Application.title: = ' Text Editor ';
   Application.createform (Tmainform, mainform);
   Application.Run;
  End.

2) unit

Unit Unit1;
Interface
Uses//List of unit dependencies goes
Implementation
Uses//List of unit dependencies goes
Implementation of class methods, procedures, and functions goes here
Initialization
Unit initialization code goes here
Finalization
Unit finalization code goes here
End.

2. Quote Unit to Unit

Uses Forms, Main;

   Forms,
   Main;
Uses Windows, Messages, Sysutils, Strings, Classes, Unit2, Myunit;

3. Reference Unit to program or library

   Windows, Messages, Sysutils,
   Strings in ' C:\Classes\Strings.pas ', Classes;