Key binding with Ctrl

[Scott Woodford]

I have been unable to bind a key with Ctrl - I tried the following in my 
.Xdefaults file:

Nedit*text.translations: #override \n\
   Ctrl<Key>d: beginning_of_line() process_shift_down() delete_selection()

This didn't work (to delete a single line), but when I used Alt instead 
of Ctrl it did.  What do I need to do to bind to Ctrl instead of Alt?

Thanks,
Scott