### Author:  [@sandra](https://discourse.slicer.org/u/sandra)
#### Post date: [August 21, 2017, 8:21am UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/1 "2017-08-21T08:21:09Z")
Hi everyone,
I would like to use SimpleItk while writting a loadable module.
My problem is about including the necessary files:
#include \ for example doesn’t work, I get the error “file not found”
I know that Slicer’s architecture is complex and I’m not sure how to include SimpleItk/the necessary files in a loadable module. I tried the different ways I could find in SimpleItk examples (in the official documentation, so not using Slicer) but I didn’t succeed.
(I did build Slicer with SimpleItk).
Thanks for your help,
Sandra.
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### Author:  [@Fernando](https://discourse.slicer.org/u/Fernando)
#### Post date: [August 21, 2017, 12:13pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/2 "2017-08-21T12:13:39Z")
Hi Sandra,
I think SimpleITK has wrappers for Python, C#, Java and R, but for C++ you should use ITK directly.
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### Author:  [@sandra](https://discourse.slicer.org/u/sandra)
#### Post date: [August 21, 2017, 12:35pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/3 "2017-08-21T12:35:58Z")
You mean that in general it isn’t possible to use simpleItk with C++ or it isn’t possible in Slicer particularly ?
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### Author:  [@Fernando](https://discourse.slicer.org/u/Fernando)
#### Post date: [August 21, 2017, 12:59pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/4 "2017-08-21T12:59:39Z")
In general:
> **[SimpleITK/SimpleITK](https://github.com/SimpleITK/SimpleITK#simpleitk)**
>
> SimpleITK: a layer built on top of the Insight Toolkit (ITK), intended to simplify and facilitate ITK's use in rapid prototyping, education and interpreted languages. - SimpleITK/SimpleITK
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### Author:  [@sandra](https://discourse.slicer.org/u/sandra)
#### Post date: [August 21, 2017, 1:02pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/5 "2017-08-21T13:02:39Z")
I saw this page where there are examples of simpleItk used in C++
[https://itk.org/SimpleITKDoxygen/html/examples.html](https://itk.org/SimpleITKDoxygen/html/examples.html)
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### Author:  [@Fernando](https://discourse.slicer.org/u/Fernando)
#### Post date: [August 21, 2017, 1:13pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/6 "2017-08-21T13:13:35Z")
> [@sandra](#):
>
> I saw this page where there are examples of simpleItk used in C++
I didn’t know about those, sorry.
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### Author:  [@fedorov](https://discourse.slicer.org/u/fedorov)
#### Post date: [August 21, 2017, 8:03pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/7 "2017-08-21T20:03:49Z")
In general, it is indeed possible to use SimpleITK from C++, but I don’t know of any examples in Slicer. @blowekamp would know for sure!
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### Author:  [@jcfr](https://discourse.slicer.org/u/jcfr)
#### Post date: [August 21, 2017, 8:27pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/8 "2017-08-21T20:27:00Z")
While possible, the build system currently do not enable this.
In a nutshell, the SimpleITK targets (available through `SimpleITKConfig.cmake`) are not exposed to extensions. Only ITK is.
To keep things simple, I suggest we stick to ITK when dealing with C++ and image processing.
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### Author:  [@blowekamp](https://discourse.slicer.org/u/blowekamp)
#### Post date: [August 22, 2017, 1:25am UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/9 "2017-08-22T01:25:29Z")
I have a module, which is still compiling, that uses SimpleITK in this way. The NucleusClosing module uses the c++ interface for SimpleITK. It still seems to work.
> **[blowekamp/Slicer-IASEM](https://github.com/blowekamp/Slicer-IASEM?files=1)**
>
> Slicer3D IASEM Microscopy Extension. Contribute to blowekamp/Slicer-IASEM development by creating an account on GitHub.
HTH
Brad
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### Author:  [@jcfr](https://discourse.slicer.org/u/jcfr)
#### Post date: [August 22, 2017, 3:59am UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/10 "2017-08-22T03:59:09Z")
Indeed 😄 , we are marking `SimpleITK` as `FIND_PACKAGE` … and the targets end up being exposed.
>
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### Author:  [@sandra](https://discourse.slicer.org/u/sandra)
#### Post date: [August 22, 2017, 8:16am UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/11 "2017-08-22T08:16:08Z")
So @blowekamp what did you do to have simpleItk working in your loadable module ?
@jcfr : do I have to write these 4 lines somewhere or are they already present in the slicer’s architecture ?
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### Author:  [@jcfr](https://discourse.slicer.org/u/jcfr)
#### Post date: [August 22, 2017, 1:08pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/12 "2017-08-22T13:08:19Z")
Hi @sandra,
You only need to “link” against the `SimpleITK` targets as it is done here:
>
In the case of loadable modules, you would add `${SimpleITK_LIBRARIES}` to the `TARGET_LIBRARIES` parameter of the logic:
>
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### Author:  [@blowekamp](https://discourse.slicer.org/u/blowekamp)
#### Post date: [August 22, 2017, 1:19pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/13 "2017-08-22T13:19:06Z")
The first step is to find the SimpleITK package in CMake:
>
Then as JC said you need to link against the SimpleITK libraries.
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### Author:  [@sandra](https://discourse.slicer.org/u/sandra)
#### Post date: [August 22, 2017, 1:20pm UTC](https://discourse.slicer.org/t/using-simpleitk-in-loadable-modules/908/14 "2017-08-22T13:20:42Z")
Ok and those lines about find the SimpleITK package, where should I write them (for a loadable module) ? (In which CMakeLists.txt)