[Openal] Unable to open the device capture ???

[wassim_belhadj]

I noticed that the sound card that I use does not make to record sound 
when the device(sound card) is open.
Indeed, alcCaptureOpenDevice me always returns NULL when the device is
opened. 
To run the capture I always have to close the device before starting the
capture and then reopen again to play the sound like this:

/**********************************************************/
ALCcontext* ptrCntxt = alcGetCurrentContext();
ALCdevice* ptrDvc = alcGetContextsDevice(ptrCntxt);
alcMakeContextCurrent(NULL);
alcDestroyContext(ptrCntxt);
alcCloseDevice(ptrDvc);

CptrDvc=alcCaptureOpenDevice(ptrucDvcNm, 44100, AL_FORMAT_MONO16, 44100);
/......................../
alcCaptureStop(CptrDvc);

//reopen again  the device

Dvc = alcOpenDevice(NULL);
ALCcontext* ptrCntxt = alcCreateContext(Dvc, NULL);
alcMakeContextCurrent(ptrCntxt);
/**********************************************************************************************/

The problem is that sometimes the capture fails because the device is open
(I do not know how ????) Maybe it was opened twice

Are there any way to close all open device?

Are there any way to circumvent what I do ... 

Help me please