How to copy data from a cell in Excell to a webpage text field?

How to copy data from a cell in Excell to a webpage text field?

I want to develop some tool which will directly copy and paste contents of
excel cell to a text field of a particular webpage.
I don't have any idea about computer programming.I have a little knowledge
of Excel VBA.
Please guide me in following aspects: 1.How to open a particular webpage
from a button click through excel. 2.How to auto-fill data into text
fields of webpage? 3.How to automatically press a button on webpage
through excel.
Please note I don't have any details about that webpage.