def poke(library, session, address, width, data):
    """Writes an 8, 16 or 32-bit value from the specified address.

    Corresponds to viPoke* functions of the VISA library.

    :param library: the visa library wrapped by ctypes.
    :param session: Unique logical identifier to a session.
    :param address: Source address to read the value.
    :param width: Number of bits to read.
    :param data: Data to be written to the bus.
    :return: return value of the library call.
    :rtype: :class:`pyvisa.constants.StatusCode`
    """

    if width == 8:
        return poke_8(library, session, address, data)
    elif width == 16:
        return poke_16(library, session, address, data)
    elif width == 32:
        return poke_32(library, session, address, data)

    raise ValueError('%s is not a valid size. Valid values are 8, 16 or 32' % width)