Convert numeric to money

Hi.
I have searched in mailing-list archives about converting types, but I couldn't
found a function or clause that convert a numeric type to money type.
How Can I convert this types?

=> select '1234'::money;  money
------------R$1.234,00

=> select '1234'::numeric::money;
ERROR:  cannot cast type numeric to money

The problem is becouse I have a table with "numeric" field, and I need to show
it like "money" type (R$ 1.234,00). Is there a function to convert it??? Or is
there a function to mask the numeric field to show like money (with
R$x.xxx,xx)???

Thanks.