>Running the following code result in an error if the key "Users" doesn't exist in the registry.
>
>goWsHost = CreateObject("WScript.Shell") && initiate Windows Scripting Host
>
>REGKEY_LOC = "HKEY_CURRENT_USER\Software\Ifö Ceramics AB\PiDoc\1.0\Window Positions\Users"
>
>* Next line gives an error saying it can not open the registry key.
>lcBuffer = goWsHost.RegRead(REGKEY_LOC)
>
>Well i understand that it can not, but how can i query the registry to check for the existance of the key or att least avoid the error message ?

You can use "local" error handler to trap errors or put the code into class and use class error event

lcOnErrorSave = ON("ERROR")
lnError = 0
ON ERROR lnError = ERROR()

lcBuffer = goWsHost.RegRead(REGKEY_LOC)

IF lnError = 1429     && OLE Error
  * OLE error on the previous line. Use AERROR() to get error details
ELSE
  * The key value retrieved
ENDIF

ON ERROR &lcOnErrorSave

You can also use Registry class from FFC. It's based on Windows API functions.