Saving a registry key follow up

I want to be able to save a registry key with all it's values to a variable in my program and then be able to restore it after changes are made. Example: Command1 button saves the key and Command2 button restores it. So if the user makes changes and then doesn't like them they will be able to restore that key to it's original values. It's the saving and restoring part I can't get.
Thanks

[Cerksees]

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