hi Martin, Thanks for your reply , I've been away for a whie :-)
I think what you wrote it's just what iwas looking for.
Thanks again
Alessio

>Hi Alessio,
>
>

>DECLARE INTEGER SetEnvironmentVariable  IN kernel32.dll STRING @, STRING @
>DECLARE INTEGER GetEnvironmentVariable  IN kernel32.dll STRING @, STRING @, INTEGER
>
>=SetEnvironmentVariable(("LoaderState"+CHR(0)),("0"))
>
>* Get environment
>lcPom=space(254)
>lii=GetEnvironmentVariable(("LoaderState"+CHR(0)),@lcPom, LEN(lcPom))
>?LEFT(lcPom,lii)
>

>
>MartinJ
>
>>I need to change the setting of a windows environment variable programmatically.
>>Is It Possible ?
>>
>>Thanks
>>Alessio