var co : CustomObject = CustomObjectMgr.getCustomObject("sample", "MyCustomObject");

 // get the object type definition
 var typeDef : ObjectTypeDefinition = co.describe();
 // get the custom object attribute definition for name "enumIntValue"
 var attrDef : ObjectAttributeDefinition = typeDef.getCustomAttributeDefinition( "enumIntValue" );
 // get the collection of object attribute value definitions
 var valueDefs : Collection = attrDef.getValues();

 // return function if there are no object attribute value definitions
 if(valueDefs.isEmpty())
 {
     return;
 }

 var displayValue : String;
 // loop over object attribute value definitions collection
 for each ( var valueDef : ObjectAttributeValueDefinition in valueDefs )
 {
     if( valueDef.getValue() == co.custom.intValue )
     {
         displayValue = valueDef.getDisplayValue();
         break;
     }
 }