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How to update Item text in a Form  RSS feed

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I created a Form with a single Item and added two commands. The form is displayed using the setCurrent() method.
This all works.

My question is: How can I change the text of the Item in the form without having to create a completely new form?

I tried to use the set method of the Item using item number 0, but this only works once as the item is removed and
a new item with a new number is created. This results in a exception, which is logical.

Then I removed the current Item from the form with deleteAll() and appended a new Item to the form, but nothing happens.
The deleteAll() method does not seem to have any effect.

I think the second approach maybe the best, but I can be completely wrong. Can any comment on my approach?

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