Before Command hook

Use this hook to perform additional actions before the form command is executed. This hook can use actual values of the form fields. You can cancel the execution of the command by calling the choice.again() function.

If the standard hook must be executed before the extension hook is executed, you can force the standard hook to execute anytime you prefer. This can be achieved by calling the command.super() function.

Example:

function extern function.approve.order.line.before.command()
{
        command.super()
        string l.mess(200) mb
|* Check approval against company rules
        if not txpurdll0001.can.approve.line.with.mess(
                        tdpur401.orno, tdpur401.pono, l.mess) then
                message(l.mess)
                choice.again()
        endif
}