How to write an Ad poster in VB.Net

Hi guys,
I would like to develop an Ad poster as I have been employed as Developer in my company,
but I don't have a lot of experience in programming.

it's a recruitment company so they used to posting Ads every day manually, so they told me to write an Ad poster for the company in VB.Net.

Please can you help with advice, how to start.

Thanks in advance Sir(s)

O'Reilly have good learning books - http://shop.oreilly.com/product/9780596003869.do

You will have to learn the language before you will be able to code an ad poster, or at least the very basics or you will hit dead ends every few minutes & spend days searching for answers with a buggy, slow program.

HTTPWebRequest is the easiest & very efficient way of doiung this, unless the site you are posting on has an API that is accessible for your purposes.

Thanks.
the site has an API but my company doesn't want cause the cost per month is expensive.
I actually develop already in VB.Net, creating Database application and so on,
I was learning HttpWebRequest onhttps://youtu.be/7Wzel-g1U54 .

Do you have any book for HttpWebRequest to suggest me?

by the way, I heard about WebClient and RESTSharp API too.
can you tell me about them??