Possible to remove a login on a Application?

[rhinostopper]

If a person makes a program that has a login on it that connects to a server, can you reverse engineer the .exe file and change the code to show a form that would otherwise be hidden or is it easier to try to re-route the server it connects to back to localhost?

[fashizzlepop]

What do you imagine would be "hidden?"

You could intercept the traffic yourself, which might be easier if you know nothing about reversing apps.

[martyj2009]

Assuming you know the type of response that would be returned on a successful login and you knew the domain that it was querying you could (and this is a guess) possibly create something in your host file for the domain to point to a server of your choosing. You could then write a script or program that is hosted at that address listening for the message to return whatever the successful message should be.

Windows host file is found at C:\Windows\System32\drivers\etc in the hosts file.