R help - Feb 2005 - How to code a bootstrap version of the Wilcoxon-Mann-Whitney test?

Dear Stefan
I need to apply a Mann Whitney test to my data, by applying a bootstrap, in
R.
Loonkig for an answer in internet I found your question to the R mailing
list but I have not found the answer to your question.
Please, could you help me?

thank you very much in advance.
Best regards
Luciana