reg key backup and restore

[maqleod 1]

does anyone know a way to back up an entire registry key (say HKCR\.txt) without knowing exactly what subkeys are present and save it to a .reg file only to call that .reg file at a later point to restore the settings?

[maqleod 1]

Run("regedit.exe /e myfile.reg HKCR\.txt")

thx