Hello

I have some difficulties solving the error message
"error C2352: 'CWnd::MessageBoxA' : illegal
call of non-static member function"

I have a dialog class (CDlg) and a static method
(static void receive()). An other function is creating
a new thread (new thread = receive).

Now I just wanted to call a MessageBox() (see code
below) but then I get the error message. I know what
might be the problem but I cant solve it - can you help
me?

BTW: The receive method must be static. Otherwise
I cannot call it with my _beginthread(receive, 0, (void*)m_pCom);



// begin relevant code
void CDlg::receive(PVOID pvoid){
DevCom *c = new DevCom();
c = (DevCom *)pvoid;

int x = c->getN();
MessageBox("text","title",MB_OK);
}
// end code

Use AfxMessageBox or ::MessageBox.

--
Tim Robinson (MVP, Windows SDK)
http://www.themobius.co.uk/

"schweingruber roland" <sg@hotmeil.com> wrote in message
news:3fbfb638$0$3221$5402220f@news.sunrise.ch...

On Sat, 22 Nov 2003 20:17:17 +0100, "schweingruber roland"
<sg@hotmeil.com> wrote:

You are trying to call a non-static function from a static function.
No go (the static function doesn't have access to "this").

Option one (my preference):
Make your receive method a member function, and modify your code so
your thread function gets a pointer to the appropriate object
(instantiation of your class), and can use it to call receive. You can
do this by passing a pointer to the object in the 4th argument to
_beginthread. I actually have use a small structure that includes the
pointer and a bit more info. Whatever is passed as the 4th argument to
_beginthread gets passed as _the_ argument to your thread function.
This looks like a memory leak to me. You created a new object,
assigned a pointer to it, then changed the contents of the pointer. I
think c contains garbage at this point, and you no longer have any way
to delete the DevCom object you just created.

Option two:
::MessageBox( NULL, "text", "title", MB_OK );
The colons at the beginning specify global, which means the Win32 API
itself.

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Robert E. Zaret
PenFact, Inc.
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