unction encrypt(ecode)
Dim texts
dim ifor i=1 to len(ecode)
texts=texts & chr(asc(mid(ecode,i,1))+i)
next
      encrypt = texts
end function
function decrypt(dcode)
  dim texts
dim i
for i=1 to len(dcode)
texts=texts & chr(asc(mid(dcode,i,1))-i)
next
decrypt=texts
end function
function mistake(preString)
      Dim texts
      Dim seed
      Dim i,length
      prestring = trim(preString)
      length = len(preString)
      seed = length
      Randomize(length)
      texts = ""
      for i = 1 to length
            seed = int(94*rnd(-asc(mid(preString,i,1))-seed*asc(right(prestring,1)))+32)
            texts = texts & chr(seed) & chr(int(94*rnd(-seed)+32))
      next
dim dist
dist=""
for i = 1 to len(texts)
  if mid(texts,i,1)<>"'"  then
      dist=dist+mid(texts,i,1)
      end if
    next
    mistake = dist
end function（出处：pconline）