>Hi Tim,
>
>Thanks for your early response.
>
>The problem that I have is that the user needs to see the result in the form and allow them to change this result with a doubleclick, so it cannot be validated, it is one a suggested value.
>
>My question was about the posibility of using the PropertyChanged event to do this.
>
>Best Regards,
>Antonio Llano

I don't know if I follow what you mean about seeing the result with a double click. If you need to show the result on the form, then maybe you need a method in your business object to determine the value and you should just call that method from your form at some point so you can set the value where it shows and saves when save is called.
Tim