Interestingly enough, setting the property storing an object reference to NULL (thisform.LastValue = NULL) still triggers delegate twice.

>I found a strange gotcha in VFP's native BindEvent. It seems that if you bind an event handler to a property (in order to have the hanlder fire when the property changes), it will fire twice if you switch from storing an object reference in the property to a character value. The first time it fires, the value changes to NULL and the second time it changes to the value that you assigned.
>
>I'm posting this as a reference.
>-m@
>
>Example code:
>
<snip>