I would use look at this code and work something out
_SCREEN.ACTIVEFORM.NAME = 'EDIT'

ln_fcount = _SCREEN.FORMCOUNT

FOR ln_scount = 1 TO ln_fcount
mvar = '_SCREEN.FORMS('+str(ln_scount)+').name'

if &mvar = = "Your_Name"
mvar2 '_SCREEN.FORMS('+str(ln_scount)+').RELEASE' or whatever
&mvar2
endif
ENDFOR


>I have a background menu form ("frmMenuMain"). When I DO the "frmCustomer"
>and from within "frmCustomer", I'd like to set a property which belongs to "frmMenuMain"
>
>How can reference/set a property of another form from within another modal form which is active?