I am a developer who is relatively new to Salesforce. In my current project, I need to pass the selected record IDs from the list view of a custom object called MyClass__c as parameters to an Apex controller, but I’m not sure how to do this.

From my research, it seems I need to use an Apex controller and Visualforce, but I don’t know how to implement this. Could someone help me with the code for this?

**Create APEXContorller
**

public class AccountController {
    public List<String> accountIds { get; set; }
    public AccountController() {
        accountIds = ApexPages.currentPage().getParameters().get('ids') != null
                     ? ApexPages.currentPage().getParameters().get('ids').split(',')
                     : new List<String>();
        System.debug('Account IDs: ' + accountIds);
    }

    public void processAccounts() {
        System.debug('Processing Accounts with IDs: ' + accountIds);
        List<Account> selectedAccounts = [SELECT Id, Name FROM Account WHERE Id IN :accountIds];
    }
}

**Create VisualForce
**

<apex:page controller="AccountController">
    <apex:form>
        <apex:pageMessages />
        <apex:commandButton value="Process Selected Accounts" action="{!processAccounts}" rerender="resultPanel"/>
        
        <apex:outputPanel id="resultPanel">
            <apex:repeat value="{!accountIds}" var="accId">
                <p>Selected Account ID: {!accId}</p>
            </apex:repeat>
        </apex:outputPanel>
    </apex:form>
</apex:page>

Add Link to ListView Custom Button
/apex/AccountControllerPage?ids={!GETRECORDIDS($ObjectType.Account)}