# Custom modules and building issue

**URL:** <https://discourse.slicer.org/t/custom-modules-and-building-issue/42033>\
**Category:** Development\
**Created:** [March 8, 2025, 9:05pm UTC](https://discourse.slicer.org/t/custom-modules-and-building-issue/42033 "2025-03-08T21:05:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![software](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/software/32/79627_2.png) [@software](https://discourse.slicer.org/u/software)\
**Post date:** [March 8, 2025, 9:05pm UTC](https://discourse.slicer.org/t/custom-modules-and-building-issue/42033/1 "2025-03-08T21:05:38Z")

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Hello everyone,

I am facing a similar issue while working with a custom 3D Slicer application. I followed the SlicerCAT guide to create a custom 3D Slicer template and built it using CMake.

Now, I want to add modules, but I am unsure where to add them and how to proceed. After adding the modules, how should I build the project to see the changes?

Additionally, what is the correct way to open the project folder for editing? Should I use VS Code or Visual Studio?

Any guidance would be greatly appreciated. Thanks in advance!