1. Error in message_box()
Got an error in using message_box that I can't figure out;
msgbox.e:89 in function message_box()
variable msgbox_id has not been assigned a value.
I installed Euphoria version 2.3 two days ago. Not sure
that has anything to do with the error.
If anyone can shed some light on the problem, I'd appreciate it.
Thanks.
Jim
2. Re: Error in message_box()
Hi Joshua,
if you look inside the MSGBOX.E file you will notice that msgbox_id variable
only gets initialised if you are running on a Windows platform. So the
problem is either you're fault for not following the manual, or (which is
really my position) RDS's fault for assuming the msgbox_id will always have
a valid value in it when message_box() is called.
BTW, here is another really good example of why allowing assignments at
declaration time makes life easier for programmers.
An extract from the current file....
--------------
integer msgbox_id, get_active_id
if platform() = WIN32 then
lib = open_dll("user32.dll")
msgbox_id = define_c_func(lib, "MessageBoxA", {C_POINTER, C_POINTER,
C_POINTER, C_INT}, C_INT)
if msgbox_id = -1 then
puts(2, "couldn't find MessageBoxA\n")
abort(1)
end if
. . .
It would have been nice to have this ...
integer msgbox_id = -1, ...
and then a test in the actual message_box() routine like ...
if msgbox_id < 0 then
....
And if we can't get initializations done at declaration time then how about
...
if not initialized(msgbox_id) then
....
---------
Derek
----- Original Message -----
From: "joshua goldberg" <futures8 at bellsouth.net>
To: "EUforum" <EUforum at topica.com>
Sent: Tuesday, February 19, 2002 4:58 AM
Subject: Error in message_box()
>
> Got an error in using message_box that I can't figure out;
>
> msgbox.e:89 in function message_box()
> variable msgbox_id has not been assigned a value.
>
> I installed Euphoria version 2.3 two days ago. Not sure
> that has anything to do with the error.
>
> If anyone can shed some light on the problem, I'd appreciate it.
>
> Thanks.
>
> Jim
>
>
>
>
