How to save alphanumeric text to file that can't be read in Notepad.

I currently have an application that includes a higher level of access to special users.  In order to prevent the login from being "hacked", the password is hard-coded in the executable.  I'd like to make this dynamic so that my users can change the password at will, but don't want anyone to be able to just open the password file in Notepad or equivalent.  Is there a way to convert and save the alphanumeric text in such a format that a simple text reader could not decipher it?
Solved!
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You should store the MD5 has of the password.
In the code you let the user enter the password, calculate the hash and see if they match.
LabVIEW has build in VIs to get the hash of a string.
It is quite hard to decode a password with unkknown length from it's hash.
Additional I would still hard-code a core password only known by you that you can type in yourself. After which you can generate a new password file.
Ton
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