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# BNullParameter

Derived from: BParameter

Declared in: be/media/ParameterWeb.h

Library: libmedia.so

Allocation: Constructor only

###### Summary

The BNullParameter class represents a junction or I/O point in the parameter web. It doesn't take any value; instead, it's used primarily to identify special places in the parameter web that need to be displayed specially by the client application.

Typical uses of BNullParameters are to identify where signals enter or leave the node (input and output jacks, ADCs or DACs, and so forth).

## Member Functions

### ValueType()

virtual type_code `ValueType(`void`)`

Return a type_code indicating the data type of the control's value; this returns 0, since BNullParameters have no value.

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