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>I have a Modal form (Form 1), the form is modal because I don’t want the user to click anywhere in the screen while he is in the form.
>
>Now, I have this particular neccessity. I have to call another form from this one, but the new form (Form 2) being called is Modeless because in this new form I want to call other forms Modeless to let the user interact between them. In another words, the user may have 2 or more forms modeless open and jump form one to another.
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>In other words, what I want is: Form 2 can call other forms and they interact between them. While the user is in Form 2, Form 1 (and other forms opened previously) cannot interact until I close Form 2.
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>How can I accomplish this without creating a Formset?
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Sounds like bad design to me. You cannot call modeless forms from a modal one, just the other way around.

You typically use a modal form when you want a data entry form called from a grid navigation form. Also a Login form should be modal.

Other than that, you should keep your modal forms to an absolute minimum. They go against Windows Standards, as users are accustomed to jumping around in Windows interfaces. Just look at Excel for example. Would you make your spreadsheet modal?