>>Now I have another problem - Form a calls form b - form b in turn calls form c - form c flashes and disappears - when I close form b I can see form a and c
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>>What have I done wrong
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>It depends on how do you call these forms and are they modal or modeless. For the modeless form the behavior you describe is common.

I call the form with do blackberrycollection - this form is modal as are all my other forms