I dont see that behaviour at all. I can open a modal form , I can interact with it, resize it, move it around, click buttons on it, use the pageframe, etc, and the main application close button is still working perfectly. I can click it and close the entire app even while the modal form is open on the screen.

If the form displays a messagebox(), however, then the main app's close button is disabled. It does not re-enable until I close the model form. You cannot click on it because it is not enabled, hence closing the modal form does not immediately fire the main application window close button.

>If a form is modal you can not interact with anything other then that form. If I have a modal form open and press apps closebutton, the app will close immediately after the form is closed.
>
>Agnes
>
>>After the messagebox closes the main application close button is still not working and stays not working until I close my form. My form is modal. Is this the cause?
>>
>>>Hi Jos,
>>>
>>>if the messagebox is active the app will normaly not close. The messagebox is modal.
>>>
>>>Agnes
>>>>Hi
>>>>
>>>>What causes the main application close button to sometimes not be available, not function? If I open a form the main application close button sometimes stops working. What are the conditions that cause this and is there a way to always have the main application close button function?
>>>>
>>>>It seems to be related to when I pop up a messagebox because immediately upon a message box being called by the form the close button on the main application deactivates.