Tab completion in Combo box ?

[Preben Randhol <randhol pvv org>]

Looking at the Combo-box code (1.2.3) I noticed that TAB completion is
implemented. I want to use this feature in a program so I tried to
press tab (after having written the first part of one of the
items). The problem is that the focus now was moved from the
entry-widget (in the combo) to the next widget in the app. Is it
possible to override the focus switching for this widget only?

Any hints much appreciated
-- 
Preben Randhol             oO     "Don't think about domination,  think
[randhol@pvv.org]        .`  ;     about freedom, it doesn't dominate."
[www.pvv.org/~randhol/]   \ G                  -- RMS, LinuxWorld 1999.
                           `_) n o m e