So i'm trying to improve my understanding of html and forms.

I've noticed when posting on message boards for example, you may post a message, and in the url
it will say &message=hi+there&submit=true.

And the message will come out "hi there"

but if i paste the exact same code into my browser url the text comes out "hi+there"

I'm guessing the problem is that when you post on a message board, it is sent using POST,
and when you put it in the URL, it is sent using GET, hence causing the problem with the message coming out differently.

I was wondering if theres a way to force the browser to use POST when typing into the url, if anyone knows a way around this problem

No. When you just enter the URL, the browser will use the GET method rather than the POST method.

I'm not sure I understand what you think the problem is.

oh hi,

what i ment was a way to send a website a post command containing what i want in it instead of having to manually type it in and click the submit button

Not sure if ordinary browsers let you do that, but a spambot will.

Can you use a form with action="post" and a few hidden fields?