We could include their sample code from Microsoft.
And, We added the includion of "mmdeviceapi.h" and we think we become able to record sounds from microphone..
#include#include https://docs.microsoft.com/en-us/windows/win32/api/mmdeviceapi/nn-mmdeviceapi-immdevice //--- const IID IID_IAudioClient = __uuidof(IAudioClient); const IID IID_IAudioCaptureClient = __uuidof(IAudioCaptureClient); //--- IMMDevice* pDevice = NULL; //---