This function returns the directory that was the current directory when the
Hollywood script was started. This is only of use when running Hollywood scripts
because in that case Hollywood will always change the current directory to the
script's directory (unless you use the -nochdir console argument)
so it's not easily possible to find out the directory that was current before
Hollywood changed it to the script's directory.
For compiled programs, the start directory will obviously always be identical to the
program directory that you can get using GetProgramDirectory().
See GetProgramDirectory for details.