I have obviously been working too hard this year and deserve several weeks holiday.

Selected top level package of use case model in project browser.
Selected Search Project button from main toolbar.
Enter "usecase" for term and "ObjectType" for search.
Click [Advanced]
Add a filter for element/Status/Contains/optional
Select the new filter line
Click [Edit filter]
Click [Help]
Voila! an abstract virtual help window is created but doesn't appear.

i.e all EA windows have lost focus, an EA help item appears on the taskbar, but there is no active window on the desktop.
As I said, is it me, the gremlins, or Windows 2000.
bewildered as ever
bruce
p.s. I have also noticed that the AVHW can be minimized and restored! (i.e. the wundows animation occurs)
p.p.s. :-/ It only happens if the EA wundow is maximized.
(p.p.ps. practicing my kiwi for a possible imminent move)
p.p.p.p.s D*mn! Now I've forgotten what I was trying to find out anyway.