Open Edge - Guide

Hi! I've decided to make this guide to give some hints about programming with OpenEdge ABL (aka Progress).
This is because there is no much content about progress besides the official documents. When I started learning and working with this language, most of what I learned was debugging old programs and LOTS of research.
I'll try to make a basic Wiki about some essentials about progress.

GitHub Guides:

Concepts of Programming:

• Basics

  Variables
  Convert Variables
  Message Box
  Condition Blocks
  Manipulate Screen Elements
  How To Use Database on Code
  Open External Window/Procedure
  Compile Apps
  Create and Modify Database
  Connect Database from PF
  Run CMD Commands
  

• Intermediate

Data Manipulation:

• Remove Word from Phrase
• Temp Table and Freeform Query
• Export Data to CSV

Database:

• Perform Online Backup
• Restore Backup File
• Each Table Sizes

General:

• Get Caller Program and User
• Scale Screen (and Elements)
• Try Catch Operations
• Register Custom DLL
• Send SMTP - HTML Emails
• List Files from Directory
• Hold Window with Pop-Up opened
• SQL Connection
• POST Request
• List All Sub Directories

Password and Encryption:

• Microsoft Azure Authentication

YouTube (PT-BR):

• Downloading and Installing Progress 4GL 12.2 Student License

  Text Guide

• Creating a Basic Database

  Source Code