About C++ MFC CButton Asynchronous

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Dear all,

I am very new to C++ with MFC Programming.
I am doing a school project which is to build a .WAV player using C++ with MFC. I must use the lower level API BUT CANNOT simply a call to "PlaySound(_T("filename.wav"), NULL, SND_FILENAME | SND_ASYNC);" to play the .WAV file.

The "play" function is already implemented, however, I don't konw how to implement the "stop" function, as when I press the "play" button (which trigger the "play" function), the "play" function LOCKs all other buttons, I cannot press the "stop" button to stop the music playing.

Are there any hints for me to implement such a "stop" function? Is it something related to "asynchronous", "multi-threading" or something else?

THANKS IN ADVANCE for any valuable reply.

Posted 20-Mar-13 3:20am

Allen Ho

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Leo Chapiro · Answer 1 · 2013-03-20T06:05:00

Solution 1

As in http://www.cplusplus.com/forum/windows/96349/[^] already said, you need to post some code - it is very unusual behavior of a PlaySound with flag SND_ASYNC !

Anyway you don't need any new thread and you can stop sound with:

C++

PlaySound(NULL, 0, 0);

Posted 20-Mar-13 6:05am

Leo Chapiro

Comments

Allen Ho 20-Mar-13 13:49pm

Sorry about my misleading presentation:
my school project prohibit us to call function like "PlaySound(NULL, 0, 0);" to manipulate the
.wav file. We have to write functions to read the .wav file and then parse the information stored in the .wav file, in order to play them.

(P.S. I can successfully play and stop the music when I call the following function from "mmsystem.h":
to play the music:
PlaySound(_T("filename.wav"), NULL, SND_FILENAME | SND_ASYNC);
to stop the music:
PlaySound(NULL, NULL, 0);
)