The constructor of your class take no parameters or take one iAnywhere.MobiLink.Script.DBConnectionContext as parameter. For example:
public ExampleClass( iAnywhere.MobiLink.Script.DBConnectionContext cc )
The synchronization context passed to you is for the connection through which the MobiLink server is synchronizing the current user.
The DBConnectionContext.GetConnection method returns the same database connection that MobiLink is using to synchronize the present user. You can execute statements on this connection, but you must not commit or roll back the transaction. The MobiLink server manages the transactions.
The MobiLink server uses the constructor that takes a iAnywhere.MobiLink.Script.DBConnectionContext parameter if it exists. If it does not, it uses the void constructor.
See DBConnectionContext interface.