[2005] TextBox and ComboBox Help

I have only just found this site so i just wanna say hi to everyone here.

I'm a beginner at VB 2005 I've been looking at source code and see what i can learn off that but most source code is fro VB 6 and its totally different compared to VB 2005 but I'm still learning so please bare with me.

Anyway i will get to the point I'm making a program that links to a site i all ways use and I've add a Textbox and ComboBox and a Command Button to it Project so i can do a search using words and the category it uses if you know what i mean this is what I've got so far i can't get the category bit to work

Code:

---

'Open Internet Explorer
        Dim IE
        IE = CreateObject("InternetExplorer.Application")
        IE.Visible = True
        IE.Navigate("http://www.nzbmatrix.com/nzb-search.php?search=" &  txtsearch.Text & cmbcat.Text)
        'Open Internet Explorer

---

txtsearch = TextBox
cmbcat.text = ComboBox

what i want it to do is when i add a Item to the ComboBox say like "TEST" i want it to make it so

"TEST" = &cat=1

So when you search for something using my project it will say

Code:

---

"http://www.nzbmatrix.com/nzb-search.php?search="[THE WORD YOU ENTER] [THE CATEGORY YOU SELECT]

"http://www.nzbmatrix.com/nzb-search.php?search="vbcode&cat=1

---

I know the message is long but i couldn't think of any other way of putting it hope this help you to see what i mean

Thanks for any reply