RETERR NdiIsBound(hndiLower, hndiUpper)
HNDI hndiLower; // NDI handle
HNDI hndiUpper; // NDI handle
The NdiIsBound function determines if the two given NDI objects are bound.
Note that (NdiIsBound(lower,upper) == OK) implies that (NdiIsBound(upper,lower) != OK).