Using the Win32::TieRegistry, I did:

$env->SetValue('PERL_PATHS', $new_dirs)

where $new_dirs contains the new paths for strawberry perl.

I then did

$path = "$path;\%PERL_PATHS\%";
$env->SetValue('Path', $path);

[download]

and then rebooted the machine. In a command window, PERL_PATHS was set properly, but PATH looked like

Path=C:\Sybase\DBISQL\bin;C:\Sybase\DataAccess64\...;C:\Program Files\Microsoft SQL Server\110\DTS\Binn\;%PERL_PATHS%

i.e.; no expansion. I then went into the Environment Variables dialog, deleted %PERL_PATHS% from PATH, saved, when back in, added it again and when I looked at PATH in a new command window, I got the expansion.

Does anyone know what else you have to do programmatically besides add a variable to another variable to get expansion to occur? Thanks

In reply to windows environment variable regression by mpersico

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