How do you know that the user isn't asking for this functionality?

>Wow. Good way to tie the users hands and not let them use the software the way they want, and possibly increasing productivity and their acceptance of the application.
>
>>Hello everyone:
>>
>> I have a SDI application, it has a menu and a toolbar. When my application running many forms or formsets can be called at same time even some forms still showing, I want to know is there any way to make the app only one form (or formset) can be actived in a special time ,thank you!