>Hi all:
>
>How do I check to see if a form is already running on THIS machine? In the example below the 'showform' property of the form is set to 2 - as top-level form.
>
>In other words, I don't care if it is running on some other machine, but if it is running on THIS machine, I do not want a second instance. In that case, I want to kill the old instance before executing this instance.
>
>BTW, how do check if it is running on ANY machine?
>
>Thanks,
>
>Yossi
>
>

>If form 'spform' is already running
>    display message asking to kill the old instance
>    if Yes
>        kill the old instance
>    else
>        get out
>    endif
>endif
>
>DO FORM sp NAME spform     &&showform = 2-as top-level form
>READ EVENTS
>

As Borislav pointed out you need to run through __SCREEN.FORMS. for each form. Identify the scx with SY(1271,oForm) or the class with oForm.CLASS; oForm.CLASSLIBRARY. To look at oform.NAME might not be the solution.
-A forms (objects) name can be altered at runtime (oForm.NAME = 'BlaBla' works fine)
-A form that is run again will be Form1 or the like to make it distinct from the first instance.