It should display the same text that AERROR() returns in the second array item. Something like

OLE IDispatch exception code 11 from >>> 11 # getsomething # 28 <<< : My COM Error.
Where,
OLE IDispatch exception code 11 from - Prefix 
>>> 11 # getsomething # 28 <<< - the first COMRETURNERROR() parameter
My COM Error - the second 

>I understand that.
>
>But it takes 2 params, both which I've filled in.
>
>Isn't it supposed to display the text of the first parameter as the
>error message?
>