Sorry, I'll try tell you more clearly.
I have 3 buttons.
PREVIEW, OK, CANCEL
I've configurated the tabbing order of this way:
1- PREVIEW
2- OK
3- CANCEL
I addition, I've configurated the key navigation:
ENTER to BUTTON OK.
When I run my application and I press tab key, the cycle is:
1.- PREVIEW
2.- OK
3.- CANCEL
4.- OK (again!!!)
Button OK again it's wrong!
Thanks vicky.