win_shell(+Operation,
+File, +Show)Windows only. Opens the document File using the Windows shell
rules for doing so. Operation is one of open,
print or explore or another operation
registered with the shell for the given document type. On modern systems
it is also possible to pass a URL as File,
opening the URL in Windows default browser. This call interfaces to the
Win32 API ShellExecute(). The Show argument determines the
initial state of the opened window (if any). See win_exec/2
for defined values.