Return currently selected video source object
src = getselectedsource(obj)
src = getselectedsource(obj) searches all
the video source objects associated with the video input object obj and
returns the video source object, src, that has
the Selected property value set to 'on'.
To select a source for acquisition, use the SelectedSourceName property
of the video input object.
obj must be a 1-by-1 video input object.
get | imaqhelp | videoinput