>Hiya Jim ----
>
>OK....it could go both ways....what if the processing object is a DLL that can't expose a UI? If the outcomes are simple, then a DO CASE in the button after a value return can show a message....

John,

Using the button to display messages is never a good design as that is not the purpose of the button. In your case of the DLL, I would create a method of the form (it is responsible with communicating from the system to the use) that called the DLL and handled any UI involved. The button would still ONLY call the form's method and not present any dialogs or messageboxes to the user.