Re: Intermittent work in UI thread

Thanks for your help.

I'm sorry for not explaining better. In "need it to be responsive", the "it" was referring to the secondary UI thread :)

I needed to be able to pause or query the secondary thread even when it was "waiting" 1 min between cycles. This would exclude any Sleep() call.

Pedro Ferreira

Joseph M. Newcomer wrote:
I presumed that by "keep the UI responsive" the OP meant that there should be no blocking
calls in the main UI thread itself; that the secondary UI thread would be doing background
work. So the main GUI thread would not be blocked, but the UI thread provides a nice
queueing mechanism, and doesn't require any PeekMessage hacks.

For example, see my serial port example on my MVP Tips site, which uses a worker thread to
handle input but a UI thread to handle output.
joe

On Tue, 16 Oct 2007 07:31:31 GMT, jetan@xxxxxxxxxxxxxxxxxxxx ("Jeffrey Tan[MSFT]") wrote:

Hi Joseph,

Yes, I agree that using the build-in message queue of the GUI thread will make us a bit easy for coding. But, as the OP stated, he wanted to keep the UI responsive, so I assume that he will show visible windows. Then, this depends on whether his background work is length or not. If the background work will cost a lot of time, it definite will block the GUI message dispatching which causes non-responsible for this UI thread. Sure, we may use PeekMessage to lighten this problem.

Anyway, this depends on the OP's specific scenario. Thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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