Your form has to be a top-level form and in the Menu Designer you have to check 'Top-level form' under General options.

>What am I missing here?
>
>I used this code in my form's init to run my menu,
>
>DO mainmenu.mpr WITH THIS, .T.
>
>I get error "NO PARAMETER statement is found."
>
>What's wrong?
>
>TIA.