Re: MFC and threads

From:

David Wilkinson <no-reply@effisols.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 03 Apr 2007 11:24:10 -0500

Message-ID:

<uCLMOQgdHHA.208@TK2MSFTNGP05.phx.gbl>

one-trick-pony wrote:

Greetings,

I am running into a problem when trying to pause a thread in MFC based
application. This is my first time using user defined Events for
synchronization. The scenario is like this. Code executes in a worker
thread and based on some conditions thread launches another new dialog
window. That window displays some message to user ie, Hello There! in
an Edit control. I provide a Resume button on the bottom of that
message Window so that user can continue after reading the message and
the worker thread should continue from where it left off. This is the
code for that Resume button.

one-trick:

It is almost never a good idea to open windows from a secondary thread.
In this situation I would use SendMessage() to send a custom message to
the main thread, and have the main thread show the dialog. You do have
to be careful with SendMessage() not to block yourself, but if the main
thread is just "keeping the GUI alive" there is no danger.

David Wilkinson