Re: this->EndDialog hangs with thread

From:

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 29 Aug 2007 01:25:05 -0400

Message-ID:

<#TMj#zf6HHA.5844@TK2MSFTNGP02.phx.gbl>

"Scott Kraemer" <skraemer8@cox.net> wrote in message
news:uD9hLkf6HHA.4436@TK2MSFTNGP03.phx.gbl...

Okay I sorta have the same problem as Alex posted above. I just wanted
some insight as to see if I am doing this right or wrong. For some
clients it works and some it hangs while closing the main dialog.

My Main dialog starts creates a global socket so I can use it in other
threads declared in main dlg header ( SOCKET clisock; sockaddr_in cli;)

I then start my IRC thread in the InitDialog
ircThread = AfxBeginThread(ircthread, 0);

my ircthread function updates dialog boxes on my main dialog by setting
something as this:

CTest1Dlg *dlg=(CTest1Dlg*) AfxGetApp()->GetMainWnd();
dlg->m_chat.AppendText(chatmsg);

That is a clear violation of MFC rules. Do not access the GUI from a
secondary thread.

Have you tried your code in a debug build? MFC normally will assert when
you violate this fundamental MFC rule. For the proper workaround see FAQ 11
& 12 here: http://vcfaq.mvps.org/mfc/index.htm