Make a simple Asp webpage
On that page drag one textbox and one button
set Textbox's TextMode property ="MultiLine"
On button click event you'll have to insert the comment in DB
(I'm supposing your DB have a table with two fields id and comment id is autoincrement)
//Open Connection
//Make Command
//Execute the command like this
//Insert into Table values('"+textbox.Text+"')";
You can get help on insertion from
here[
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