public bool Activate(AuthorEncryptionKey encryptionKey,
    Int32 licenseId, string password, Int32 productID,
    string installationName, List<SystemIdentifier> currentIdentifiers,
    ref LicenseError lastError)
{
    ActivateInstallation ws = new ActivateInstallation(encryptionKey);
    ws.LicenseID = licenseId;
    ws.Password = password;
    ws.ProductID = productID;
    ws.ProductVersionNumber = System.Reflection.Assembly.GetCallingAssembly().GetName().Version;
    ws.InstallationName = installationName;
    if (currentIdentifiers.Count > 0)
        ws.ActivationData = SystemIdentifier.GenerateActivationDataXml(currentIdentifiers);

    XmlActivationService client = new XmlActivationService();
    // If you are using SOLO Server Dedicated URL or a self-hosted instance of SOLO Server,
    // set the client.Url property here.  You may also configure proxy settings on this object here, if necessary.
    ws.WebServiceClient = client;

    if (!ws.CallWebService())
    {
        lastError = ws.LastError;
        return false;
    }

    //TODO: Store the new Installation ID from the value in the ws.InstallationID property

    return true;
}

Public Function Activate(ByVal encryptionKey As AuthorEncryptionKey, ByVal licenseId As Int32, _
    ByVal password As String, ByVal productID As Int32, _
    ByVal installationName As String, ByVal currentIdentifiers As List(Of SystemIdentifier), _
    ByRef lastError As LicenseError) As Boolean

    Dim ws As New ActivateInstallation(encryptionKey)
    ws.LicenseID = licenseId
    ws.Password = password
    ws.ProductID = productID
    ws.ProductVersionNumber = System.Reflection.Assembly.GetCallingAssembly().GetName().Version
    ws.InstallationName = installationName
    If currentIdentifiers.Count > 0 Then
        ws.ActivationData = SystemIdentifier.GenerateActivationDataXml(currentIdentifiers)
    End If

    Dim client As New XmlActivationService()
    ' If you are using SOLO Server Dedicated URL or a self-hosted instance of SOLO Server,
    ' set the client.Url property here.  You may also configure proxy settings on this object here, if necessary.
    ws.WebServiceClient = client

    If Not ws.CallWebService() Then
        lastError = ws.LastError
        Return False
    End If

    ' TODO: Store the new Installation ID from the value in the ws.InstallationID property

    Return True
End Function

No code example is currently available or this language may not be supported.