Most of my recent programming has been on 32-bit Windows using C/C++/C#/VB6 . Lately,

Question

0

Asked: May 11, 20262026-05-11T07:08:51+00:00 2026-05-11T07:08:51+00:00

Most of my recent programming has been on 32-bit Windows using C/C++/C#/VB6 . Lately,

0

Most of my recent programming has been on 32-bit Windows using C/C++/C#/VB6 . Lately, my customers are asking if my code will run on 64-bit Windows.

I’m wondering what legacy features I might be using that will break on 64-bit Windows? What are some real-world issues I need to think about and worry about?

Obviously, I will test my code on the 64-bit OS, but I’d like to know what common issues to look for. I more concerned with the existing binaries, but I am open to comments about what to worry about when recompiling (where possible).

EDIT: Here is a nice list of 64-bit porting bugs.