Here's another....file I/O difficulties.

[stylin]

Well, I don't know how it works but it does seem solid. Neat.

Simply, it overlays Password$ end-to-end over X$, then XORs X$ based on the value of Password$ at that character:

Code:

This is the line to be encrypted.
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   passwordpasswordpasswordpasswordp

While yours XORs every character of X$ (RealText) with the entire Password$ (KeyString):

Code:

This is the line to be encrypted.
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   ppppppppppppppppppppppppppppppppp
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   sssssssssssssssssssssssssssssssss
   sssssssssssssssssssssssssssssssss
   wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
   ooooooooooooooooooooooooooooooooo
   rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
   ddddddddddddddddddddddddddddddddd

Hope that clears it up.