For replication between android device (db) and Server (db) I plan to use DateTime.Now as a key field. ie to retrieve data updated after the last update, I feel DateTime.Now is good candidate.
But this mobile application is only an extension to an already available windows application...
I am using this function to send commands to a server
private Sub SendCommand(workName As String, Command As String, Signature As Boolean, url as String)
Dim ToSing As String
If Signature Then
url = X_PrivateUrl
ToSing = "command=" & workName & "&" &...