Hi Alexander

I had a \ at the end of the key string, I have removed it and will see if that fixes the problem.

Thanks for the suggestion.

John

>>It was writing to an existing key and I was trying to write it with an "0" it works with Windows 98 and above etc but I have a couple of people using Windows 95 that it won't update. Have you tried it with Windows 95 first edition?
>
>Hi,
>I know that if you a have a slash at the end of key string (like "Software\MyCompany\MyProgram\"), then it will work with Win98, but wouldn't work with Win95. Just remove slash at the end.