Have you considered an interface like strace and (the unix) time? 
perl vcproj_filter.pl make all >output.txt 2>&1

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To launch the child, you'd use 

system { $ARGV[0] } @ARGV

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The down side of this method is that the output of make and vcproj_filter will get mixed together.

In reply to Re^4: access to ERRORLEVEL on Win32 by ikegami
in thread access to ERRORLEVEL on Win32 by gkraus

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