Note: This procedure requires editing a registry value; avoid attempting this if you are not familiar with working with your system registry, as a mistake can cause serious problems with Windows. Start Regedit and use the "Registry/Export Registry File" menu option to create a backup copy of your original registry. Then, find the "Hkey_Current_UserSoftware......AppletsHearts" registry entry. Set the "String Value" of this entry to "ZB", and enter value "42". Start the game and press CTRL + ALT + SHIFT + F12, and you will see all the cards.