tkinter absorb chars

[phil]

Sorry for the repost, but moderator
jeld the last one,

In a Tkinter entry field (or Pmw entry)
how could I eat charactres?

Say a certain char is keyed in. Say &
I notice in the event handler for <key>.
I don't want any more charactres to display or
be in the field until I handle, in the
event handler, another character. Say ?

Can the event handler somehow destroy the chars
in the meantime?

Thanks