A not very elegant ADSI extender version.
AddExtender("wwads44i.dll")
strServer = 'yourserver'
strServerPath = dsFindPath('LDAP://CN=Sites,CN=Configuration,DC=yoursub,DC=yourdomain', '(&(objectClass=server)(cn=%strServer%))')
strSite = ItemExtract(2, ItemExtract(3, strServerPath, ','), '=')
Pause(strServer:"'s Site", strSite)