system "start program 2>Xerr >Xout";

[download]

Update: Doh! In the above, the redirections apply to start, but not to program. Here is something that works (tested): 

system 1, 'program 2>Xerr >Xout';

[download]

In reply to Re: Async execution in Win32 by ikegami
in thread Async execution in Win32 by herby1620

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