Topic
32-bit / 64-bit Interoperability
Topic page for teams working through 32-bit / 64-bit interoperability, C++/CLI boundaries, and native DLL integration decisions in Windows systems.
Why this topic becomes sticky
32-bit / 64-bit issues are rarely just a difference in build settings; they tend to pull in process boundaries, DLL calls, existing COM assets, and whether C++/CLI is involved at all. That is why fixing only the visible error tends to get you stuck again unless the overall approach has been sorted out.
Questions we often sort out in consultations
- how to handle the assets that remain on the 32-bit side
- where to cut the boundary between the new .NET side and native DLLs
- whether C++/CLI is the more reasonable choice or P/Invoke is enough
- how to absorb the constraints of the deployment setup and the operating environment
Typical direction
For interoperability questions, deciding the boundary design before the feature work itself means less backtracking later. The practical approach is to start from the related technical articles and the design review and migration support pages, and sort out what to keep fixed and what to change.
Get in Touch
If this page is close to the situation you are dealing with, please contact us with the current context and what kind of support you need.