bool ServiceHasValidLicense(
	LicenseType licenseType,
	Guid serviceID
)

Function ServiceHasValidLicense ( 
	licenseType As LicenseType,
	serviceID As Guid
) As Boolean

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using QMSAPI;

class Program
{
     static void Main(string[] args)
     {
         try
         {
             // create a QMS API client
             IQMS apiClient = new QMSClient();

             //retrieve a time limited service key
             ServiceKeyClientMessageInspector.ServiceKey = apiClient.GetTimeLimitedServiceKey();

            bool hasPublisherLicense = apiClient.ServiceHasValidLicense(LicenseType.Publisher, Guid.Empty);

            if(hasPublisherLicense)
                Console.WriteLine("The publisher license is valid.");
            else
                Console.WriteLine("The publisher license is not valid.");
         }
         catch(Exception e)
         {
             Console.WriteLine("An error occured when validating the license: " + e.Message);
         }
         // wait for user to press any key
         Console.ReadLine();
     }
}