# how to study orthanc. i want programing on visual studio to modify web viewer
**URL:** https://discourse.orthanc-server.org/t/how-to-study-orthanc-i-want-programing-on-visual-studio-to-modify-web-viewer/618
**Category:** Google Groups archive
**Created:** [February 12, 2017, 6:01pm UTC](https://discourse.orthanc-server.org/t/how-to-study-orthanc-i-want-programing-on-visual-studio-to-modify-web-viewer/618 "2017-02-12T18:01:12Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Jose\_Ramon\_Chavez\_Da](https://discourse.orthanc-server.org/u/Jose_Ramon_Chavez_Da)
#### Post date: [February 12, 2017, 6:01pm UTC](https://discourse.orthanc-server.org/t/how-to-study-orthanc-i-want-programing-on-visual-studio-to-modify-web-viewer/618/1 "2017-02-12T18:01:12Z")
hi. i am a latino guy. and i have some questions. how to work with orthanc code. i have a problem. cmake send this message:
the c compile identification is unknown
the cxx compiler identification is unknown
cmake error at CMakelists.txt:3 (proyect):
no CMAKE\_C\_COMPILER could be Found
and
no CMAKE\_CXX\_COMPILER could be found.
please any help!
---
### Author:  [@Thibault\_Nelis](https://discourse.orthanc-server.org/u/Thibault_Nelis)
#### Post date: [February 15, 2017, 2:10pm UTC](https://discourse.orthanc-server.org/t/how-to-study-orthanc-i-want-programing-on-visual-studio-to-modify-web-viewer/618/2 "2017-02-15T14:10:15Z")
Hello, you need to set up C and C++ compilers that can be leveraged by
CMake. Please refer to CMake documentation for how it detects them and
your system documentation for how to install one. Refer to this Q/A for
some example resolutions: [http://stackoverflow.com/q/14807294](http://stackoverflow.com/q/14807294).
---
### Author:  [@Jose\_Ramon\_Chavez\_Da](https://discourse.orthanc-server.org/u/Jose_Ramon_Chavez_Da)
#### Post date: [February 23, 2017, 3:39pm UTC](https://discourse.orthanc-server.org/t/how-to-study-orthanc-i-want-programing-on-visual-studio-to-modify-web-viewer/618/3 "2017-02-23T15:39:17Z")
hi. i can compile but i have new error. cmake for windows send me a this message.
MSVC compiler version = 1900
JsonCpp include dir: JSONCPP\_INCLUDE\_DIR-NOTFOUND
Looking for C++ include JSONCPP\_INCLUDE\_DIR-NOTFOUND/json/reader.h
Looking for C++ include JSONCPP\_INCLUDE\_DIR-NOTFOUND/json/reader.h - not found
CMake Error at Resources/CMake/JsonCppConfiguration.cmake:32 (message):
Please install the libjsoncpp-dev package
Call Stack (most recent call first):
CMakeLists.txt:295 (include)
i dont have idea to how resolve.
---
### Author:  [@Alain\_Mazy3](https://discourse.orthanc-server.org/u/Alain_Mazy3)
#### Post date: [February 23, 2017, 3:45pm UTC](https://discourse.orthanc-server.org/t/how-to-study-orthanc-i-want-programing-on-visual-studio-to-modify-web-viewer/618/4 "2017-02-23T15:45:49Z")
when you run cmake, you should use these options to avoid external dependencies issues:
-DSTANDALONE\_BUILD=ON -DSTATIC\_BUILD=ON -DALLOW\_DOWNLOADS=ON
---
### Author:  [@jodogne](https://discourse.orthanc-server.org/u/jodogne)
#### Post date: [February 23, 2017, 3:45pm UTC](https://discourse.orthanc-server.org/t/how-to-study-orthanc-i-want-programing-on-visual-studio-to-modify-web-viewer/618/5 "2017-02-23T15:45:55Z")
Hello,
Build instructions for Windows are available in the Orthanc Book:
[http://book.orthanc-server.com/faq/compiling.html](http://book.orthanc-server.com/faq/compiling.html)
Regards,
Sébastien-