procedure TFormMyself.Edit1Change(Sender: TObject); begin if length(edit1.text)=7 then bitbtn1.SetFocus; end;
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这样做好象就可以,我还没发现有错误!调试过了,应该没问题,GOOD LUCK! procedure TForm1.Edit1Change(Sender: TObject); begin if length(edit1.Text)>7 then begin showmessage('only 7'); edit1.text:=copy(edit1.text,1,7); end; if length(edit1.text)=7 then button1.SetFocus; end;
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