This content originally appeared on DEV Community and was authored by CAD Old Dog
(Forgive my awkward “AI‑style” English, I’m not a native speaker)
I’ve been coding in C++/MFC for decades, but never touched .NET or VB.NET.
Last week I tried something new: I asked ChatGPT to help me rebuild an old Excel reporting tool I originally wrote in MFC.
Here’s all I did:
Describe what I needed
Paste the code it gave me into Visual Studio
Hit run
In 30 minutes I had a complete Excel → Word → PDF automation workflow, including a small algorithm I thought would be too tricky for AI.
If I coded this myself in MFC? Easily 3 weeks.
When it worked, I was amazed… and honestly a bit terrified.
If AI can do this now, what happens 5 years from now?
I recorded the full 5‑minute process (real code running, no cuts, just sped up):
https://youtu.be/-mf_yOhOCfs
Have you ever let AI write an entire app for you?
Not selling anything. Just sharing what shocked me. Thank you.
This content originally appeared on DEV Community and was authored by CAD Old Dog
CAD Old Dog | Sciencx (2025-08-06T00:21:29+00:00) First Time Using .NET — AI Built My Whole App in 30 Minutes (My MFC Version Took 3 Weeks). Retrieved from https://www.scien.cx/2025/08/06/first-time-using-net-ai-built-my-whole-app-in-30-minutes-my-mfc-version-took-3-weeks/
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