The new process is given the same 'show' state as that used when creating the
calling process. This will usually be 'show normal' or 'show maximised'.
The alternative function START_PPROCESS@ takes the same form but returns
immediately (i.e. it does not wait for the created process to terminate).
In order to issue a DOS command you will need to invoke the command shell by
using the prefix 'cmd /c ' followed by the DOS command. The alternative is to call CISSUE@