s="dkMoNpA"
For i=1 to len(s)
ch=mid(s, i, 1)
if ch>="A" and ch<="Z" then ch=chr(asc(ch) +32)
if ch>="a" and ch<="z" then ch=chr(asc(ch) -32)
st=st+ch
Next i
Text1.text=st
经过程序段处理后,文本框中最终显示的内容是( )