This snippet of code will only work under Win32.
Wrote it on a quiet afternoon at work a few months back.

$_4_=60;$_5_=$_4_*60;$_6_=$_5_*24;$_8_=Win32::GetTickCount()/
1000;$_1_=int($_8_/$_6_);$_3_=int(($_8_-$_1_*$_6_)/$_5_);$_2_
=int(($_8_-$_1_*$_6_-$_3_*$_5_)/$_4_);$_7_=int($_8_-$_1_*$_6_
-$_3_*$_5_-$_2_*$_4_);printf "Uptime %02dd:%02dh:%02dm:%02ds"
,$_1_,$_3_,$_2_,$_7_;
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Did I win the attractive set of steak knives?

Mightor