$SControl
A global merge field type to use when referencing an existing custom s-control by name.
This merge field type results in a URL to a page where the s-control executes.
Usage
Use dot notation to access an existing s-control by its name.
Example
The following example shows how
to link to an s-control named HelloWorld in a Visualforce page:
<apex:page>
<apex:outputLink
value="{!$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:
<apex:page>
<apex:scontrol controlName="HelloWorld" />
</apex:page>