[XeTeX] landscape mode with XeLaTeX

[Daniel Greenhoe]

Hi everyone,

How can I produce a pdf with landscape orientation using XeLaTeX. Here is what I have tried so far
  xelatex -papersize=landscape filename
  xelatex -papersize="a4 -l" filename
  xelatex -papersize=a4:landscape filename

These give me the following error messages:
  ** ERROR ** Unrecognized paper format: landscape
  ** ERROR ** Unrecognized paper format: a4 -l
  ** ERROR ** Unrecognized paper format: a4:landscape

I am running Miktex 2.7 on a Windows XP platform.

Many thanks in advance,
Dan