Ok, I use AutoHotKey to enable the keys on keypad.
[keypad plus] results in [ctrl+c] and [keypad enter] results in [ctrl+v]. I use this keybinding since 1991 with different editors.
What I'm looking for is the key with the + on it which is not on the keypad. I asume it will be a job for AutoHotKey to bind [alt+plus].