Reference: start
start(s) executes the operating system command s, using the Win32 API call ShellExecute.
Examples: start(".") opens the current working directory.
start("C:\") opens the folder C:\.
start("http://rejbrand.se") opens the URL rejbrand.se in the system's default web browser.
start("mailto:andreas@rejbrand.se") opens the system's default e-mail client and creates a new message for Andreas Rejbrand (whose e-mail address is andreas@rejbrand.se).
start("winword") opens Microsoft Word, if installed.