vid return type

Hi, I am trying to use some image centroids functions of matlab from c# client. I am using .net builder of matlab. It works fine but I can not get return type of vid camera parameters.

Here is the matlab code

function [myvid] = connect_camera()
vid = videoinput('winvideo', 1, 'YUY2_160x120');
myvid =vid;

Here is the c# code

 MWArray myvid ;
 Class1 myclass = new Class1();
 myvid = myclass.connect_camera();

myvid is not return any value but null.

Thank you Nuri Erginer gnexlab