2026 Codex In-Depth AI Coding Agent Tutorial: 53 Lessons from Quick Start and Domestic Model Integration to C++ and MFC Development System Practice

Course Overview

"Codex In-Depth · AI Coding Agent Tutorial 2026" is a 53-lesson hands-on course combining Codex AI coding, C++ fundamentals-to-advanced, MFC desktop development, DLL dynamic libraries, and reverse-analysis cases. It starts with a quick Codex start, connecting Codex to domestic LLMs, and uses cases like Excel processing, API calls and course-cover generation to show how the AI coding agent joins real tasks. Then it moves into MFC and C++ development, systematically teaching scrollbars, Spin Control, DC drawing, double buffering, three-primary-color drawing, timers, progress bars, List Control, Tree Control and Tab Control, while covering mixed C/C++ development, Python calling a C++ DLL, inheritance, polymorphism, virtual functions, multiple and virtual inheritance, static members and the singleton pattern. The advanced part continues with DLL exported classes, DllMain, and MFC shared/static/extension libraries, and uses a DLL-tool case to teach processes, modules, export tables and file mapping. The second half uses the "Tian Long" game case to teach disassembly and program-data analysis: function-call analysis, character data, backpack data, environment objects and skill-tree traversal. The whole path is "Codex smart coding → C++ basics → MFC UI → DLL development → low-level analysis cases", ideal for learners who want to combine AI coding with traditional C++ desktop development.

Who It's For

1. Codex learners starting from zero
2. C/C++ programming learners
3. MFC desktop developers
4. People who want AI-assisted coding
5. People who want to learn low-level development

What You Gain

1. Master the basic use of Codex
2. Learn to use AI to assist real programming tasks
3. Master core C++ and MFC development
4. Understand DLL dynamic-library development
5. Improve program analysis and debugging skills

Course Catalog

1. 1. How to use Codex quickly
2. 2. Connect Codex to domestic LLMs
3. 3. Excel made easy with Codex
4. 4. Codex calls an API and generates a course cover
5. 5. MFC scrollbar control
6. 6. MFC spin up-down control
7. 7. MFC DC drawing
8. 8. MFC graphic controls and double-buffer drawing
9. 9. MFC drawing with the three primary colors
10. 10. MFC timer, progress bar and slider
11. 11. MFC List Control
12. 12. MFC List Control (continued)
13. 13. MFC Tree Control
14. 14. Tab Control
15. 15. Two ways for C++ to call a dynamic library, and Python calling a C++ DLL
16. 16. extern keyword and macros; mixed C and C++ development
17. 17. C++ object-oriented inheritance
18. 18. Polymorphism and virtual functions; finding the vtable via disassembly
19. 19. OOP multiple, diamond and virtual inheritance
20. 20. C++ static members and the singleton pattern
21. 21. C++ static members and the singleton pattern (continued)
22. 22. DLL exported classes and the .def file
23. 23. The DLL entry point DllMain
24. 24. MFC DLL shared, static and extension libraries
25. 25. DLL injector — process-list dialog UI
26. 26. DLL injector — show the first process
27. 27. DLL injector — show only windowed processes
28. 28. DLL injector — list process modules and their base addresses
29. 29. DLL injector — load a DLL via file dialog
30. 30. DLL injector — show exported functions in UI
31. 31. DLL injector — DLL file mapping
32. 32. DLL injector — get DLL exported functions
33. 33. DLL injector — get the DLL export table
34. 34. DLL injector — get exported functions in the main UI
35. 35. DLL injector — process privilege escalation
36. 36. MFC animation and date/calendar controls
37. 37. MFC IP address control, split button and hyperlink
38. 38. MFC menu bar and hotkeys
39. 39. Tian Long — locating the send-packet function and the principle of finding a call
40. 40. Tian Long — locating the pathfinding call and disassembly of injection parameters
41. 41. Tian Long — pathfinding call in C++
42. 42. Tian Long — x64dbg reverse analysis of the character data base address
43. 43. Tian Long — C++ dynamic library calling a static library
44. 44. Tian Long — C++ reading HP and MP
45. 45. Tian Long — reverse analysis of backpack data 01
46. 46. Tian Long — reverse analysis of backpack data 02
47. 47. Tian Long — reverse analysis of backpack item data
48. 48. Tian Long — C++ reading backpack item names
49. 49. Tian Long — reverse traversal of the character surroundings
50. 50. Tian Long — recursive pre-order traversal of surrounding binary-tree environment objects
51. 51. Tian Long — traversing the skill binary tree 01
52. 52. Tian Long — traversing the skill binary tree 02
53. 53. Tian Long — recursive skill binary-tree traversal and set deduplication