>The only way I have succeeded in doing this is to use the OLDVAL() function.
>If the values compare equal then SETFLDSTATE back to unchanged. Valid() is where I do it but LostFocus() should work too I guess.
>Hacker's warns that using SETFLDSTATE() does NOT prevent an update from taking place so when it comes time to write I use GETFLDSTATE(-1) to check for any changes, reverting if there are none.

Thanks, this is what I am doing as well.