Hello Vic, Thank you for explanation. I will read about OAuth. But what I completely don't understand why second (local) WEB server is involved.
There is my desktop app on my computer. It can Java or exe program on C or C#. There is the Google WEB server. It looks enough for working with spreadsheet. I just would like to add, read, delete entries in my spreadsheet programmatically inside of my program. As I understand I need only to send some GET or POST request to some Google WEB server. Then I should read the response. Done. It'll work without local WEB server. Thanks again.
