def load_call_dict(call_dict, lib):
    """Loads argument/return types from the call dictionary

    @param call_dict: call dictionary. Keyed by function name;
                      values are [return type, argtype0, argtype 1...]
    @type call_dict: dict
    @param lib: library where functions specified in L{call_dict} live.
    @type lib: ctypes.WinDLL or ctypes.CDLL
    """
    for funcname in call_dict:
        func = getattr(lib, funcname)
        args = call_dict[funcname]
        func.restype = args[0]
        if len(args) <= 1:
            func.argtypes = None
        else:
            func.argtypes = args[1:]
