In general, any dos.library function which fills in a structure for you
(for example, examine()), requires that the structure be longword aligned.
In most cases, the only way to insure longword alignment in C is to
dynamically allocate the structure.  Unless documented otherwise,
dos.library functions may only be called from a process, not from a task.
Also note that a process's pr_msgport is intended for the exclusive use of
dos.library.  (The port may be used to receive a wbstartup message as long
as the message is getmsg()'d from the port before dos is used.