I have written user defined functions that are passing matrices as
arguements and would like to disable the function results in the
function arguement window. Any suggestions?

hi, john !

> I have written user defined functions that are passing matrices as arguements
> and would like to disable the function results in the function arguement window.
> Any suggestions?

a wild idea is valid ?

make your udf a private function procedure (so it won't appear in the function-wizard dialog)
and *call* for it knowing that *there it is* (you shall provide the *known* arguments)

also, note that you won't be able to paste it's arguments in formula-bar (ctrl+shift+A)

hth,
hector.