UFT Pro (LeanFT) .NET SDK Reference, Version 14.03
Launch Method (BrowserFactory)
Example 
Launches a new browser tab returning an instance of IBrowser for the launched browser.
Overload List
OverloadDescription
Launch(BrowserType)Launches a new browser tab returning an instance of IBrowser for the launched browser.  
Launch(BrowserType,IEnvironment)Launches a new browser tab returning an instance of IBrowser for the launched browser.  
Example
// Launch the Chrome browser.
IBrowser browser = BrowserFactory.Launch(BrowserType.Chrome);