If you would like to use Code::Blocks instead of Visual Studio, there's a few things required in order to use for developing Orx projects.
Code::Blocks can be downloaded from: http://www.codeblocks.org/downloads/26
The version required is codeblocks-16.01-setup.exe which doesn't come with a compiler.
Run the installation and choose the default options. Then run Code::Blocks.
When running Code::Blocks for the first time, a dialog box will appear with a list of auto-detected compilers on your system. If you already have a non-TDM version of mingw greater or equal to version 5.3.0, then select that and you are good to go. If not, OK the dialog box and continue reading.
Code::Blocks needs a compiler. It doesn't ship with one in the setup version. But you will need to pick the right MinGW. There are a few variations around:
Orx no longer supports the TDM versions or vanilla versions of MinGW.
MinGW-w64 is the correct one to use for Orx.
At the time of writing, 8.1.0 is the version to use. But to check on the current version requirements, visit the Orx supported platforms here.
Start by downloading the MinGW-w64 installer at: https://mingw-w64.org/doku.php/download/mingw-builds
Run the installer and go through the steps. These are outlined on this page: http://orx-project.org/wiki/tutorials/compiling_orx_with_mingw32_gmake
Follow the steps titled Getting MinGW-w64 and Updating the PATH environment variable.
You're all good to go.