exec { schtasks /foo } #Let's send a bogus argument to the task scheduler executable
write-host "This should not be output!"

Output:
    ERROR: Invalid argument/option - '/foo'.
    Type "SCHTASKS / QUERY /?" for usage.
    Error executing command:  schtasks /foo
    At C:\dev\blog_post\default.ps1:11 char:8
    +         throw <<<<  $errorMessage
        + CategoryInfo          : OperationStopped: (Error executing command:  sch
       tasks /foo :String) [], RuntimeException
        + FullyQualifiedErrorId : Error executing command:  schtasks /foo