Inicialización del GDK

#include <XGameRuntimeInit.h>
#include <XTaskQueue.h>
#include <xsapi-c/services_c.h>

// ...

void InitializeXboxLive()
{
    // ...
    HRESULT hr = XGameRuntimeInitialize();
    if (FAILED(hr))
    {
        // handle error: couldn't initialize the Gaming Runtime service.
    }

    XblInitArgs xblArgs = {};
    xblArgs.scid = "00000000-0000-0000-0000-000000000000"; // Add your SCID here that you got from the Partner Center web portal.

    HRESULT hr = XblInitialize(&xblArgs);
    if (FAILED(hr))
    {
        // handle error: couldn't initialize XBOX Live.
    }
    // ...
}