>>>>It should just cancel the process without altering/indexing, right?
>>>
>>>Yes. But ALTER TABLE in this case shows the Messagebox.
>>
>>I have SET ESCAPE ON and ON ESCAPE doSomething(). I guess, this would change the default behavior...
>>>>I'll try SET TALK ON...
>>>
>>>I just tried and it shows the progressbar even with SET TALK OFF
>>
>>I meant I want this progress bar for ALTER TABLE command, not for Modify structure, which is interactive...
>
>Yes, I mean ALTER TABLE shows the progressbar even with SET TALK OFF

Well, I've tried in Command Window and progress bar appeared. However, I could not stop this process by hitting ESC, so I've just killed VFP. I guess, I corrupted the table by doing this.
So, the problem of stopping process by ESC still remains.