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title: $SControl
collection: developer
version: current
locale: en-us
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canonical_url: https://developer.salesforce.com/docs/platform/salesforce-pages-developers-guide/guide/pages-variables-global-scontrol.html
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  - Platform Developer Content
---

# $SControl

A global merge field type to use when referencing an existing custom s-control by name. This merge field type results in a URL to a page where the s-control executes.

**important:** Visualforce pages supersede s-controls. Organizations that haven't previously used s-controls can’t create them. Existing s-controls are unaffected and can still be edited.

## Usage

Use dot notation to access an existing s-control by its name.

## Example

The following example shows how to link to an s-control named HelloWorld in a Visualforce page:

<!-- otherprops: scontrol=HelloWorld apex_page -->
```markup
<apex:page>
<apex:outputLink 
    value="{!$SControl.HelloWorld}">Open the HelloWorld s-control</apex:outputLink>
</apex:page>
```

Note that if you simply want to embed an s-control in a page, you can use the `<apex:scontrol>` tag without the $SControl merge field. For example:

<!-- otherprops: scontrol=HelloWorld apex_page -->
```markup
<apex:page>
    <apex:scontrol controlName="HelloWorld" />
</apex:page>
```