I own Worcraft 3 Region of Chaos and Worcraft 3 The Frozen Throne original keys.
Is it possible that you replace original keys for Worcraft 3 Reforced key.
Hey, SmokeyVR1976! The RoC/TFT keys cannot be exchanged for the Reforged version of the game. However, these keys should allow the game to be played with the Classic version of the game, just the HD graphics will not be available along with some other limitations.
Just make sure that the CD Key is claimed on the account, login to the Battle.net Desktop Application, install and launch the game and it should default you to the Classic version.
If you would like the Reforged version of the game, it’s available for order in the shop.