Most Bluetooth development is focussed on Android, iOS and Linux. However, it’s also possible to use Bluetooth on Microsoft Windows.
BluetoothLEExplorer is a free app that allows you to scan for Bluetooth devices and read/write Bluetooth Service Characteristics. If you wish to create your own variant of the app or learn how to use Bluetooth on Windows, the source code for BluetoothLEExplorer is on GitHub.