kABInstantMessageServiceMSN MSN instant message service. Declarationlet kABInstantMessageServiceMSN: String See AlsoConstantskABInstantMessageServiceAIMkABInstantMessageServiceFacebookkABInstantMessageServiceGaduGadukABInstantMessageServiceGoogleTalkkABInstantMessageServiceICQkABInstantMessageServiceJabberkABInstantMessageServiceQQkABInstantMessageServiceSkypekABInstantMessageServiceYahoo