can someone tell the command for determing the OS version for XP, I think winnt if for both Windows 2000/xp

eg: below

;REM ***** Windows NT/2000/XP *****
;IF OS = "winnt"
;WRITE "test for Vritualdr.com"
;#\\servername\path
;IF "%ERROR_LEVEL" = "1" THEN
;EXIT
;END
;END