Visualforce Developer Guide

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Introducing Visualforce
Tools for Visualforce Development
Getting a Quick Start with Visualforce
Customizing the Appearance and Output of Visualforce Pages
Standard Controllers
Standard List Controllers
Custom Controllers and Controller Extensions
Advanced Examples
Override Buttons, Links, and Tabs with Visualforce
Using Static Resources
Creating and Using Custom Components
Dynamic Visualforce Bindings
Dynamic Visualforce Components
Integrate Email with Visualforce
Visualforce Charting
Creating Maps with Visualforce
Render Flows with Visualforce
Templating with Visualforce
Developing Salesforce Apps with Visualforce
Adding Visualforce to a Salesforce AppExchange App
Using JavaScript in Visualforce Pages
Communicating Across the DOM with Lightning Message Service
Visualforce Best Practices
Standard Visualforce Component Reference
Appendices
Global Variables, Functions, and Expression Operators
Global Variables
$Action
$Api
$Asset
$Cache.Org
$Cache.Session
$Component
$ComponentLabel
$CurrentPage
$FieldSet
$Label
$Label.Site
$MessageChannel
$Network
$ObjectType
$Organization
$Page
$Permission
$Profile
$Resource
$SControl
$Setup
$Site
$System.OriginDateTime
$User
$User.UITheme and $User.UIThemeDisplayed
$UserRole
Functions
Expression Operators
Security Tips for Apex and Visualforce Development
Apex Classes Used in Visualforce Controllers
Execution Governors and Limits
PDF

$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.

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.

Important

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>