include window
call OK mvwinsch $win1 0 0 `\001E`
call OK wrefresh $win1
compare winsch1.chk

call OK mvwaddstr $win1 1 3 "aaa"
call OK wrefresh $win1
call OK mvwinsch $win1 1 1 `\000x`
call OK wrefresh $win1
compare winsch2.chk