HelloI want to consume a web service from a winform .net application (developed by an other firm in asp.net) and it requires an authentificationSo i tried to send a credential to it, but i receive an http 401 error unautorizedSo i checked out what is the soap message sent from my client, but it doesn't contain any authentification in the header This is my code :CredentialCache v_Credential = new CredentialCache(); ServiceCodaAuthentifie.InputService v_ServiceScoda = new ServiceCodaAuthentifie.InputService();