>The max properties also seem to affect autocenter. Have you noticed this?

Yes, it is correct because MaxLeft and MaxTop is a limit of the form position.

But MaxLeft is used only when the form is created;
after it is ignored ( one of the bugs i found on this subject )

Put two buttons B1,B2 with :

B1.click
thisform.Autocenter = .T. && <=== this ignore MaxLeft

B2.click
thisform.MaxLeft = m.thisform.MaxLeft && <== this fire C internal code

The VFPT implement it for this master task:

thisform.MaxLeft = sysm(0)- 40 && force the form into the desktop area
* and put next line in moved event
thisform.MaxLeft = m.thisform.MaxLeft

* but this can to be done with the next line into the Moved event
thisform.Left = MIN(m.thisform.Left,sysm(0)- 40)

Then, because MaxLeft and MaxTop are passive properties, they are useless.

Fabio