Neil,

Try this:
>

>IF MESSAGEBOX("Are you sure you want to run a system check",1) = 1
        ** OK button selected
 ELSE
        ** Cancel button selected
 ENDIF
>

Cheers,

Zoran


>I have a messagebox which pops up when I click a button on a form. If the user clicks the cancel button I want to abort the program which will run. How do I do this?
>
>

>MESSAGEBOX("Are you sure you want to run a system check",1)
>

>
>Many Thanks