---
title: "IOBluetoothFindNumberOfRegistryEntriesOfClassName(_:)"
framework: IOBluetooth
role: symbol
role_heading: Function
path: "iobluetooth/iobluetoothfindnumberofregistryentriesofclassname(_:)"
---

# IOBluetoothFindNumberOfRegistryEntriesOfClassName(_:)

The number of registry entries with a device classname.

## Declaration

```swift
func IOBluetoothFindNumberOfRegistryEntriesOfClassName(_ deviceType: UnsafePointer<CChar>!) -> Int
```

## Return Value

Return Value Number of HID devices.

## Overview

Overview Returns total number of registry entries with the provided device classname. For example, IOHIPointing.

## See Also

### Miscellaneous

- [IOBluetoothGetUniqueFileNameAndPath(_:_:)](iobluetooth/iobluetoothgetuniquefilenameandpath(_:_:).md)
- [IOBluetoothIsFileAppleDesignatedPIMData(_:)](iobluetooth/iobluetoothisfileappledesignatedpimdata(_:).md)
- [IOBluetoothNSStringFromDeviceAddress(_:)](iobluetooth/iobluetoothnsstringfromdeviceaddress(_:).md)
- [IOBluetoothNSStringToDeviceAddress(_:_:)](iobluetooth/iobluetoothnsstringtodeviceaddress(_:_:).md)
- [IOBluetoothNumberOfAvailableHIDDevices()](iobluetooth/iobluetoothnumberofavailablehiddevices().md)
- [IOBluetoothNumberOfKeyboardHIDDevices()](iobluetooth/iobluetoothnumberofkeyboardhiddevices().md)
- [IOBluetoothNumberOfPointingHIDDevices()](iobluetooth/iobluetoothnumberofpointinghiddevices().md)
- [IOBluetoothNumberOfTabletHIDDevices()](iobluetooth/iobluetoothnumberoftablethiddevices().md)