> For the complete documentation index, see [llms.txt](https://docs.stylemixthemes.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stylemixthemes.com/cost-calculator-builder/develeopers-guide/cost-calculator-hooks.md). # Cost Calculator Hooks This is a guide for developers to customize and extend Cost Calculator features with code. A hook is a piece of code that programmers use to change or extend applications or operating systems by catching and working with messages or events that happen inside them. #### Where to put your code? If you want to add a special piece of code to your website, you can place it in the [WPCode ](https://wordpress.org/plugins/insert-headers-and-footers/)plugin, your child theme's functions.php, or your own custom plugin. Before you make any changes to the code, make sure you have FTP access in case there are mistakes. {% hint style="info" %} Important: This guide has PHP code and is meant for developers. We share the code as a friendly gesture but don't provide support for code customization or third-party development. {% endhint %} There are lists of hooks used in the Cost Calculator plugin for:


Order Management Hooks	These hooks let developers customize Orders in the Cost Calculator.	Order Management	orders-ccb.jpeg
Contact Form Hooks	These hooks let developers customize Contact Form in the Cost Calculator.	Contact Form	Cost Calculator WordPress Plugin _ Price Estimation Calculator - YouTube.png
Confirmation Page Hooks	These hooks let developers customize Confirmation Page in the Cost Calculator.	Confirmation Page	fb-instag-banner-success-A (1).png
Email Hooks	These hooks let developers customize Email in the Cost Calculator.	Email	Email Template_FB.png

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