use Win32::AdminMisc qw(GetGroups GROUP_TYPE_GLOBAL); yields

"GROUP_TYPE_GLOBAL" is not exported by the Win32::AdminMisc module at 
+C:\WINNT\Profiles\DSMITH\Desktop\junk.pl line 1
"GetGroups" is not exported by the Win32::AdminMisc module at C:\WINNT
+\Profiles\DSMITH\Desktop\junk.pl line 1
Can't continue after import errors at C:\WINNT\Profiles\DSMITH\Desktop
+\junk.pl line 1
BEGIN failed--compilation aborted at C:\WINNT\Profiles\DSMITH\Desktop\
+junk.pl line 1.
[download]

Looks like this is one of the brain-damaged Win32 modules. :(