>I runned some tests and creating by code seems to give me more flexibility than
>creating in DE
>
>Now I have some doubts
>
>1-Do I attrib index to it when select command or set index in cursor properties ?

If you're doing something in form's Load now, do everything in Load - set order there (and indexes on cursors)

>
>2- Do I need the create cursors and delete when the form is closed , or can I let it created in the begining of the application ?
>

The cursors would be closed automatically if your form uses private DS

>3-If I need to delete it, which is the best method in the form ?

See #2.