why not change it to :

LPARAMETERS pKey, pSCA

DO CASE
CASE pkey = 5 AND pSCA = 0    && down arrow
     && do some stuff - this works correctly
    NODEFAULT    && to avoid double keystrokes
CASE pkey = 24 AND pSCA = 0   && up arrow
     && do some stuff - this also works correctly
    NODEFAULT    && to avoid double keystrokes
ENDCASE

IOW just don't allow the kestrokes you handle to go through Arnon > >What is wrong with this? Why do TABs and Shift-TABs no longer move the focus to the next and previous controls respectively? > >This is a different class from the one that originally gave me this problem. > >Thanks in advance.