# Cost Calculator Hooks

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:

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th><th data-hidden data-card-cover data-type="files"></th></tr></thead><tbody><tr><td><strong>Order Management Hooks</strong></td><td>These hooks let developers customize Orders in the Cost Calculator.</td><td></td><td><a href="/pages/nlYT0ABdavI4KoTbJpVX">/pages/nlYT0ABdavI4KoTbJpVX</a></td><td><a href="/files/wyFtky7iVAWjcQKIGZ6W">/files/wyFtky7iVAWjcQKIGZ6W</a></td></tr><tr><td><strong>Contact Form Hooks</strong></td><td>These hooks let developers customize Contact Form in the Cost Calculator.</td><td></td><td><a href="/pages/oLmUUcrQxNBdeNornzzw">/pages/oLmUUcrQxNBdeNornzzw</a></td><td><a href="/files/TENlXVkrZScIC7D92gML">/files/TENlXVkrZScIC7D92gML</a></td></tr><tr><td><strong>Confirmation Page Hooks</strong></td><td>These hooks let developers customize Confirmation Page in the Cost Calculator.</td><td></td><td><a href="/pages/JAQ4YmtJ4l2s5kVwuPx4">/pages/JAQ4YmtJ4l2s5kVwuPx4</a></td><td><a href="/files/ROwRZ0kqhKx3kqN6ZIMX">/files/ROwRZ0kqhKx3kqN6ZIMX</a></td></tr><tr><td><strong>Email Hooks</strong></td><td>These hooks let developers customize Email in the Cost Calculator.</td><td></td><td><a href="/pages/OXRR8MERYtu0AxCpkkE7">/pages/OXRR8MERYtu0AxCpkkE7</a></td><td><a href="/files/NEn5VOnk9Ismt80WAZft">/files/NEn5VOnk9Ismt80WAZft</a></td></tr></tbody></table>


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