Accessing remote computer specially at home is required when you are on move or when you are in office. ISP do change IP addresses if your computer falls under dynamic ip allocation. Though change is not often but this could be a bit of problem when you are accessing home computer and get disconnected in between and there is no body at home to tell you the new IP address.
MyIP is windows based program which solves this problem by tracking the change in IP of your home / remote computer and then email you the new IP so you can connect back remotely using the new IP address.
All you need is to configure your email address with password and you will be updated every time your IP changes. Useful and very handy. Download MYIP @ Codeplex