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I have read all related map messages and I think we have some misunderstanding. Actually, If we decided to use property of calling form as a place to store 'variables' we DON'T NEED to send them as parameters. Surely this will work nice if called form is modal. This case just create array-property in first 'calling' form, fill it with some values and then use this property inside all events/methods of next modal 'called' form.