This is what I use....GUIDs

This code, I think (it's been a while) came from Rick Strahl's website..

*** Run this once at the beginning of your app (in your MAIN.PRG)

DECLARE INTEGER CoCreateGuid ;
  IN Ole32.dll ;
  STRING @lcGUIDStruc
DECLARE INTEGER StringFromGUID2 ;
  IN Ole32.dll ;
  STRING cGUIDStruc, ;
  STRING @cGUID, ;
  LONG nSize

*** Run this as required.

PROCEDURE GetGUID
cStrucGUID=SPACE(16)
cGUID=SPACE(80)
nSize=40
IF CoCreateGuid(@cStrucGUID) # 0
   RETURN ""
ENDIF
IF StringFromGUID2(cStrucGUID,@cGuid,nSize) = 0
  RETURN ""
ENDIF
RETURN STRCONV(LEFT(cGUID,76),6)
ENDPROC

>How good is sys(2015) generated id in multiuser environment to be assigned as primary key for tables that do not have primary key of there own.
>
>
>Rajesh