Has any one had success with setting up a camera stream and saving a snapshot to a file using c++?

This is what I have so far:

EZ_B::EZB ^ezb;
ezb = gcnew EZ_B::EZB("MyEZB");

EZ_B::Camera ^ezbCam;
ezbCam = gcnew EZ_B::Camera(ezb);

ezbCam->StartCamera(EZ_B::Camera::GetVideoCaptureDevices()[1], 320, 240);
ezbCam->SaveImageAsJPEG("c:\test.jpg");

I can confirm that the camera is on by running:

BOOL camOK = ezbCam->Camera::IsActive;
cout << "Camera on? " << camOK << "\n";

What am I missing here?

Best, Lars