Environment variable support

Hey there.  I'm wondering if there's support (albeit undocumented) for environment variables (like %WINDIR%, for example).  From previous forum threads it appears support wasn't there previously but I'm really hoping things have changed.

Specifically, here's what I'm trying to accomplish:

var info:NativeProcessStartupInfo = new NativeProcessStartupInfo();

info.executable = File.applicationDirectory.resolvePath(whereisPath);

info.workingDirectory = File.applicationDirectory;

var args:Vector.<String> = new Vector.<String>();

args.push('-r');

args.push('%WINDIR%\\SysWOW64;%WINDIR%\\System32'); // searches in the Windows system paths

args.push('-s'); // succinct output. Prints path only

args.push(exeToFind);

info.arguments = args;

nativeProcess = new NativeProcess();

addListeners();

nativeProcess.start(info);

When I run the executable with the same arguments in CMD, %WINDIR% is correctly interpreted.  However, when run from AIR, it appears that %WINDIR% is never translated.

Thanks for any info...even if it turns out it's just not supported.

Aaron