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how to execute a system command?

wrb
i want to open a excel file in a button click event.
i found that os.popen4("excel.xls") would work but it is too slow
(much slower than i execute "excel.xls" in command line. ) even worse,
until excel is closed, the GUI has no response to user action.

any advice would be helpful.
May 23 '07 #1
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