You can modify to this:

function Depart

clear events
* deactivate window all
pop key all
on shutdown

if _VFP.StartMode = 0 && Development Mode
Clear All && This Relases all Memory variables and Windows
set sysmenu to default
set library to
modify window screen
=sys(3056) && Reread Registry and config.vfp settings
Else
Clear All && This Relases all Memory variables and Windows
Close Databases All
Close All
endif

return .F.

Deactivate Window only hides all windows except modal windows (like Messageboxes)