pub unsafe extern "system" fn BluetoothGATTGetCharacteristics(
hDevice: HANDLE,
Service: PBTH_LE_GATT_SERVICE,
CharacteristicsBufferCount: USHORT,
CharacteristicsBuffer: PBTH_LE_GATT_CHARACTERISTIC,
CharacteristicsBufferActual: *mut USHORT,
Flags: ULONG,
) -> HRESULT