Click File->New->Addon, will show you a guide to create an addon.The addon's name must be inputed.
After you click Save, an addon will be created.
IGAS-Studio-HelloWorld-7
just try
IGAS-Studio-HelloWorld-4
Just try
IGAS-Studio-HelloWorld-3
IGAS-Studio-HelloWorld-6
Code helper
IGAS-Studio-HelloWorld-8
IGAS-Studio-HelloWorld-5
IGAS-Studio-HelloWorld-11
IGAS-Studio-HelloWorld-10