>>>Hi,
>>>
>>>I want to disable user's ability to close a form via X in the upper right corner (while there are some pending changes) and then enable it after user Saves/Cancels the changes. I can't seem to find the way to do it. Is there a property of WinForm window to do so?
>>>
>>>TIA.
>>
>>Check this thread Re: Eliminating the X in the control box Thread #1440447 Message #1440499
>
>Thank you. It looks like again one has to jump through all kind of hoops in .NET compared to where it was simple property in VFP.

As U.I. form I think the idea of making the X box disappear and reappear leaves something to be desired in the first place.