Initially in check the web addin in add-in manager window & 
in Record & Run Settings,choose Web tab.

Then...give the following script & see...

systemutil.Run "your appl url"

ex:
systemutil.Run "yahoomail.com"

To invoke the web application.

In QTP, Enter IEXPLORE "Your appl url"

ex: 
Iexplore "http:\radix:8080\project1"

syntax: systemutil.Run "Browser", "ur web url"

systemutil.Run "iexplore.exe", "www.yahoo.com"

do you write the script in web application go to qtp choose
on web page example yahoo or gmail and go to record ->click
on insert menu choose xml testing with page or link->chose
the hand icon on any menu->stop the record and ->run

web application scripting in qtp

SYNTAX:
BROWSER("BROWSER NAME").PAGE("PAGE
NAME").WEBXML("SETTINGS").CHECK CHECKPOINT("SETTINGS")

Invokeapplication"C:\Program Files\Internet 
Explorer\IEXPLORE.EXE"

Use the Object reference Model of qtp
and you will find many ways there

Systemutil.run "URL" 



 --------  It's Enough

invokeapplication " specify the path "

Browser("<Browser>").Navigate "<URL>".

Hi..

u can call below function, and Pass your URL.

Public Function OpenInternetExplorer(URL)
	Dim IE
	Set IE = CreateObject("InternetExplorer.Application")
	IE.Visible = True
	If URL <> "" Then
		IE.Navigate Trim(URL)
	Else
		IE.Navigate "about:blank"
		ExitTest
	End If
	Environment.Value("HWND") = IE.HWND
End Function