# Injector Constructor Arguments

The injector can be constructed with three optional arguments:

| Argument       | Type                            | Required | Default                                   | Description                                                                                                                       |
| -------------- | ------------------------------- | -------- | ----------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------- |
| **binder**     | instance or instatiation path   | false    | `wirebox.system.ioc.config.DefaultBinder` | The binder instance or instantiation path to be used to configure this WireBox injector with                                      |
| **properties** | struct                          | false    | structnew()                               | A structure of name value pairs usually used for configuration data that will be passed to the binder for usage in configuration. |
| **coldbox**    | `coldbox.system.web.Controller` | false    | null                                      | A reference to the ColdBox application context you will be linking the Injector to.                                               |

If you are using WireBox within a ColdBox application, you don't even need to do any of this, we do it for you by using some configuration data in your ColdBox configuration file or conventions.

{% hint style="info" %}
By default, WireBox when constructed is automatically stored in application scope as `application.wirebox`
{% endhint %}

```javascript
// Simple Creation - automatically stored in application.wirebox
new coldbox.system.ioc.Injector()

// Custom Binder
new coldbox.system.ioc.Injector( "config.MyBinder" )

// Custome Binder + Properties
new coldbox.system.ioc.Injector( "config.MyBinder", { props } )
```