Go through all Kinects...

mainKinect.cpp

#include <iostream>
#include <Windows.h>
#include <NuiApi.h>

int main() {
    INuiSensor *nuiSensor;
    HRESULT hr;
    HANDLE mHandleSkeletonStream;
    HANDLE mHandleNextSkeletonEvent;
    int sensorCount = 0;
    hr = NuiGetSensorCount(&sensorCount);
    if (FAILED(hr))
        return hr;
    // Look at each Kinect sensor
    for (int i = 0; i < sensorCount; ++i) {
        // Create the sensor so we can check status, if we can't create it, move on to the next
        hr = NuiCreateSensorByIndex(i, &nuiSensor);
        if (FAILED(hr))
            continue;
        // Get the status of the sensor, and if connected, then we can initialize it
        hr = nuiSensor->NuiStatus();
        if (hr == S_OK) {
            break;
        }
        // This sensor wasn't OK, so release it since we're not using it
        nuiSensor->Release();
    }
    if (nuiSensor != nullptr) {
        // Initialize the Kinect and specify that we'll be using color and skeleton tracking
        hr = nuiSensor->NuiInitialize(NUI_INITIALIZE_FLAG_USES_SKELETON);
        if (SUCCEEDED(hr)) {
            // Create an event that will be signaled when skeleton data is available
            mHandleNextSkeletonEvent = CreateEventW(NULL, TRUE, FALSE, NULL);

            // Open a skeleton stream to receive skeleton data
            hr = nuiSensor->NuiSkeletonTrackingEnable(mHandleNextSkeletonEvent, 0);
        }
    }
    if (NULL == nuiSensor || FAILED(hr)) {
        //No Kinect found
        return E_FAIL;
    }

    while (true) {
        if (nuiSensor == nullptr)
            return -1;

        // Wait for 0ms, just quickly test if it is time to process a skeleton
        if (WaitForSingleObject(mHandleNextSkeletonEvent, 0) == WAIT_OBJECT_0) {
            NUI_SKELETON_FRAME skeletonFrame = {0};
            HRESULT hr = nuiSensor->NuiSkeletonGetNextFrame(0, &skeletonFrame);
            if (FAILED(hr))
                return hr;
            // smooth out the skeleton data
            nuiSensor->NuiTransformSmooth(&skeletonFrame, NULL);
            for (int i = 0 ; i < NUI_SKELETON_COUNT; ++i)
            {
                NUI_SKELETON_TRACKING_STATE trackingState = skeletonFrame.SkeletonData[i].eTrackingState;

                if (trackingState == NUI_SKELETON_TRACKED)
                {
                    // We're tracking the skeleton
                    NUI_SKELETON_DATA *skeletonData = &skeletonFrame.SkeletonData[i];
                    std::cout << skeletonData->SkeletonPositions[NUI_SKELETON_POSITION_HAND_RIGHT].y << std::endl;

                }
                else if (trackingState == NUI_SKELETON_POSITION_ONLY)
                {
                    // we've only received the center point of the skeleton
                }
            }
        }
    }
}