Syntax:
system.util.run("path of the application")
this invokes any type of application.

Hi we can invoke the application in the following ways
1).systemutil.run"path of the application"
2).Invokeapplication"path of the application"

Hi this is neeraj, and i went through your query and the
solution is:


Systemutil.Run("iexplore")
Set vBrowser=Browser("Creationtime:=0")
vBrowser.navigate("Url of your application for example:
"gmail.com" ")

Description:

this is descriptive programming code, this code first will
open the "Internet Explorer" and then will put your given
"url" to the browser automatically.

above methods are correct one more method is there we can 
create IEexplore object and pass the URL.

set Browser =createobject("InternetExplorer")
Browser.visible =True

we have 2 ways in QTP to open a web application through the 
script,
1)
systemutil.run("URL")
or
systemutil.run "iexplore.exe","URL"

2)
systemutil.run("iexplore")
set vbrowser=createobject("creationtome:=0")
vbrowser.navigate"URL"