Function spinFloatGetValue 

pub unsafe extern "C" fn spinFloatGetValue(
    hNode: spinNodeHandle,
    pValue: *mut f64,
) -> spinError

Retrieves the value of a float node @see spinError

@param hNode The float node of the value to read @param pValue The double pointer in which the value is returned

@return spinError The error code; returns SPINNAKER_ERR_SUCCESS (or 0) for no error