PathParamsSet writes the parameters
from the structure pointed to by params into the Path
object. Also, it writes the implementation-specific structure pointed
to by external (if external is not NULL)
into the Path object.
path
a handle to a Path object
*params
a pointer to a MPIPathParams
structure
*external
a pointer to a void or
NULL
Return Values
MPIMessageOK
if PathParamsSet
successfully writes the path parameters.