Rodrigo,

This is an old bug. The problem is that you don't have any controls that can take focus, so VFP is infinitely looping around trying to find some control to give focus. The large number of containers in containers is what causes it.

I ran into this a couple of years ago on a view only machine status display. My solution was to add a commandbutton to the form and set it's .Top and .Left to -100 so that it was not visible.

>VFP6 with SP3, windows 2000 pro sp2
>
>I'm testing the flat button class uploaded on 04/25 and when put 8 or more controls there is speed problems.
>After a lot of test I detect problems with containers inside other containers