>I want to call a method but only if my field value is change.
>
>Right now, I was keeping the old value in a property and comparing this with the field value in the Valid() event to know if I have to call my method.
>
>I want to simplify this and use InteractiveChange() event.
>
>But, InteractiveChange() event is fire whenever the user press a key and not only when he exit the field. For example, the value is 33. So, after the first 3, the InteractiveChange() will be fire and also after the second one.

...but, if the user then type BackSpace twice, after typing 33, the value of the field will remain the same when leaving, so i think you need to know both, the value when entering and when leaving the field.

>How can I only have one call to my method without having to keep the value in a property?

If, for some reason, the prob. is adding a new property to your control, u can use the tag property to hold the value when getting the focus, and comparing it with the current value when loosing the focus, much like u already was doing, IMO. Perhaps u can include this in your base class.

Ciao,

J. Luis