>>What version do you use?
>>DF answered me with this message: Thread #166956 Message #167070
>>When I asked a similar question...
>
>Hi Nancy I am using VFP 5.0
>Coud you give the date you got these message, I don't have a Primier Mebership.

Plinio, I just revisited this numbers, actually it's three-folded level threads :) and probably will not give you much help. Instead you may apply following workaround just to ensure that your app will work Ok:
***Combo.Gotfocus event
Thisform.Button.Tag="A"
***Combo.Lostfocus event
Thisform.Button.Tag="B"
***Button.Click event
if this.tag="A"
return
endif