The Registration Code window appears on top of the Register PC Access window, whenever you need to re-enter your PC Access registration code. Normally this window will not need to appear while you are running PC Access itself, because the UAM should have asked you for your registration code earlier. The UAM writes your registration code to the file REGCODE.DAT in your PC Access executable directory, and PC Access reads it from there when you register your copy of PC Access.
If this window should appear when you run PC Access, enter the four-character registration code from your copy of PC Access. (In PC Access versions 4.10 and 4.20, the registration code appears on a colored sticker on the outside of your PC Access shipping package. Sticker colors are red for upgrade versions, orange for network versions, and yellow for new agent or broker/office copies. Without your registration code, you can't run PC Access.) After you type in your registration code and select the OK button, the Registration Code window closes and you may proceed with filling out the Register PC Access window.