can some guide step by step how to create a extension and publsih in store,,,,i wanted to create extension for my customer website
If you want to build extensions for Magento 1.*, this tool http://magicento.com/ can help you alot, it makes the process of buildiong extensions very straightforward
If you wanted to create an extension, then you have to use the best tool for making extension ie. Wappalyzer. Choose the useful name to the extension.