Or you can use jv.ValueObject = serverObj.Encrypt()

....
        Dim Job = New VisualCron.JobClass
        Job.Name = "Job name"
        Job.Group = "Group"
        Job.Description = "Description"

        Dim task As VisualCron.TaskClass
        task = Job.AddTask(VisualCron.TaskClass.TaskT.VariableSet)
        task.Name = "TaskName"
        task.VariableSet.UserVariable.Name = "VarName"
        task.VariableSet.UserVariable.Description = "VarDESC"
        task.VariableSet.UserVariable.ObjectType = TypeCode.String
        task.VariableSet.UserVariable.ValueObject =  ClientObj.Encrypt("TEST")

....

Unhandled error in SetVariable: System.InvalidOperationException: Errore nel documento XML (1, 1). ---> System.Xml.XmlException: Rilevati dati non validi al livello radice. Riga 1, posizione 1.
in System.Xml.XmlTextReaderImpl.Throw(String res, String arg)
in System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
in System.Xml.XmlTextReaderImpl.ParseDocumentContent()
in System.Xml.XmlReader.MoveToContent()
in System.Xml.Serialization.XmlSerializationPrimitiveReader.Read_string()
in System.Xml.Serialization.XmlSerializer.DeserializePrimitive(XmlReader xmlReader, XmlDeserializationEvents events)
in System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
--- Fine della traccia dello stack dell'eccezione interna ---
in System.Xml.Serialization.XmlSerializer.Deserialize(XmlReader xmlReader, String encodingStyle, XmlDeserializationEvents events)
in OBOKIIHBDBPMCFALPGECCIFHCDJPEDKODDGK.MGLNHPPKDCCKDPNBCENHDMEIPAGBOLKEHNGM.OLDBBAHMBPBAIBLDHMIAPKPIOLBIJBKLKJHD.HOJMMAIEMGIHFJDPBILPDGDDIAKLLLFFJFKA(String , Type , Boolean ) in C:\sourcefiles\code\VisualCronService\Main\modXML.vb:riga 129
in VisualCronService.VariablesAPI.GetVariableValue(Byte[] ValueObject, TypeCode ObjectType, VariableReplacerClass VR) in C:\sourcefiles\code\VisualCronService\Variables\apiVariables.vb:riga 259
in VisualCronService.VariablesAPI.GetVariableValue(UserVariableClass uv, VariableReplacerClass VR) in C:\sourcefiles\code\VisualCronService\Variables\apiVariables.vb:riga 244
in OBOKIIHBDBPMCFALPGECCIFHCDJPEDKODDGK.MBMHNJEFPGOMLCDMANINOFKHALKKLMPEFBJA.IDFIKEDJHGPCEDDEDCLJBKGCEIMGBDHAKLHH() in C:\sourcefiles\code\VisualCronService\Jobs\TaskProcesses\Internal\clsProcessTaskVariableSet.vb:riga 55

To prevent misunderstanding we made this simplier by creating a method for this:

serverObj.Variables.SetVariableValue(TypeCode, value)

You need to upgrade to this version:

http://www.visualcron.co....aspx?g=posts&t=5231