Apex code

Just add the following lines just before you execute the Insert or Update statement in your Apex Extension class.

    dupcheck.dc3Api api = new dupcheck.dc3Api();
ApexPages.Message prevention = api.doDuplicatePrevention(**Object**);
if (prevention != null) {
   ApexPages.addMessage(prevention);
   return null;
}

Replace **Object** with the object you are adding or updating.

Prerequisites

• Have the Premium or PDM edition of Duplicate Check for Salesforce.
• Use an extension class in your custom VisualForce page.
• Use the following code in your VisualForce page to display the Deduplicate Warning message:

< apex:pagemessages escape="false"/ >