Get FORM Path dynamically

function FORM_PATH return char is
vPath varchar2(200);
vPath_Len pls_integer;
vPath_Sep char(1);
begin
vPath := get_application_property(current_form);

if get_application_property(operating_system) in ('MSWINDOWS', 'MSWINDOWS32', 'WIN32COMMON') then
vPath_Sep := '\';
else
vPath_Sep := '/';
end if;

vPath_len := instr(vPath,vPath_Sep,-1);

if vPath_Len > 0 then
vPath := substr(vPath,1,vPath_Len);
else
vPath_Len := null;
end if;
return vPath;
end;