[ You don't actually run this code on Mac, but on COWS or COWS2 or some COWS-compliant interpreter that has the IPC library attached.  Both functions hook to Mac and have it execute the file "Example.mac".  You should have created such a file with Mac and stored it in ~/Library/Mac or /LocalLibrary/Mac. 

The first function calls Mac but immediately returns control to you. ]





[ The second function calls Mac but waits 'till its done before returning control to you. ]