Re: is WeOnlyDo.Security.Cwwryptography.KeyManager (General questions)
Lily,
Here is sample in VB6 how to connect to server with PrivateKey (server must have your public key in that case) using wodFtpDLX component.
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Dim dlx1 As New wodFtpDLXCom
Dim cert As New Certificate
Set dlx1.Certificate = cert
cert.LoadKey App.Path & private.txt
dlx1.HostName = your_hostname
dlx1.Authentication = authCertificate
dlx1.Login = your_login
dlx1.Protocol = SFTP
dlx1.Connect
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Hope I helped.
Drazen