I doings some Windows 2000 splunking and have no problem adding entries to the key of interest, but it seems the registry is cached and my changes are not showing up if I open a new cmd.exe window. Can see then in regedit, and if I do a save there, the changes become visible. This leads me to thinking the registry is cached, so how do I flush it? 
#!/usr/bin/perl
#------------------------------------------------
# Fun with Windows 2000 Registry
#------------------------------------------------
use strict;
my $Registry;
use Win32::TieRegistry (
    TiedRef     => \$Registry,
    Delimiter   => "/",
    ArrayValues => 1,
    SplitMultis => 1,
    AllowLoad   => 1,
    AllowSave   => 1,
    qw( REG_SZ REG_EXPAND_SZ REG_DWORD REG_BINARY 
            REG_MULTI_SZ KEY_READ KEY_WRITE EY_ALL_ACCESS ),
    );

my $Environment = $Registry->{"LMachine/System/CurrentControlSet/Contr
+ol/Session Manager/Environment"} or  die "Can't find the Cuurent Sess
+ion Environment: $^E\n";

my $okay = $Environment->SetValue( "CRAP1", '%CDS_INST_DIR%\tools\bin'
+, 2);

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In reply to How to flush Windows registry cache by Anonymous Monk

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