Howard has praised Moyes' work in the transfer market for Everton.
He said: "David Moyes was brilliant in the transfer market with what he had to spend and the resources he had to deal with. He worked magic.
"Over those eleven years he built up a reputation for buying the right players and then seeing his teams play the right way.
"His players trusted in him and it was kind of a two-way street. It was a happy marriage between David Moyes and Everton. And for the club, everything worked out well."