@makis_best Why don't you use a vb.net web service directly in IIS and pass there in XML all the values in a string. I would create a json in b4a, URL encode it and send it in a string of the web service. On vb.net side, I would UrlDecode it (Uri.UnescapeDatastring), deserialize it (in a dictionary = map in b4a) and get all the values - no problem. I suppose you can do the same with the jRDC2 but I have never used it so I am not in a position to express any suggestions for it.
In vb.net there is built in way to use stored procedures with parameters.