# ReadProbe

Read the value of a Probe.

### Synopsis

`Err ReadProbe( Item ProbeItem, int32 *ValuePtr )`

### Description

Read the instantaneous value of an instrument output.

### Arguments

ProbeItem
  Item number of the knob to be tweaked.

ValuePtr
  Pointer to where to put result. Task must have write permission for that address.

### Return Value

The function returns a non-negative value if successful or an error code ( a negative value) if an error occurs.

### Implementation

SWI implemented in Audio folio V24.

### Associated Files

audio.h

### See Also

``CreateProbe`(), DeleteProbe()`