Is Visible hook

This hook should not use actual values of the form fields. The code in the hook is processed before actual data is read from the database or the form. If you must control the availability of the form command based on data on the screen, you can use the Is Enabled hook. You can use data that is not related to actual contents of the screen, for example parameter data.

Example:

function extern boolean function.create.bp.easy.is.visible()
{
|* Quick creation of business partners not allowed for users
|* of department 300
        select  tccom001.cwoc
        from    tccom001
        where   tccom001.loco = :logname$
        as set with 1 rows
        selectdo
                if strip$(tccom001.cwoc) = "300" then
                        return(false)
                endif
        endselect
        return(true)
}