Basic Customization > Windchill Customization Basics > Managing Customizations > Best Practices for Adding New Packages and Files > Adding a Custom Service Provider Property File > Compiling Custom Classes
  
Compiling Custom Classes
The syntax to compile custom java classes to the Windchill codebase is: ant -f bin/tools.xml class -Dclass.includes=*.java -Dclass.source=<Windchill>/wtCustom/<custom-subdirectories>