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These
three pointers give
offsets relative to
the
segment
address
in
DS.
The
parameter
strings
must be
in
the
same
segment
as
the
parameter
block
which
points
to
them.
When
control
is
passed
to
the application,
CX:DX
will
point
to
a copy
of
the
execution
parameter
block.
The
application
program
may
examine any
of
the
strings
pointed
to
by
the
execution
parameter
block,
but
it
should
not
modify them.
If
on
return,
the
carry
flag
is
set,
an
error
occurred
while
trying
to
execute
the
specified
program,
and
the
error
code
will
be
in
AX.
41
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