This is a simple Delphi/Pascal unit to get notified when an USB device is connected or disconnected. This works on the Windows platform.
The constructor of the class (
TMDUsbNotify) expects a GUID identifying the USB device. To get a notification for all devices, use the
To get the GUID for a certain device contact your vendor or look here.
A current list of Device Interface GUIDs can be found under the following registry key:
Also these CodeProject articles may be of interest:
This example demonstrates how to get notified when a Garmin USB GPS device is connected or disconnected.
How does it work?Top
It basically uses the
RegisterDeviceNotification function and waits for the
WM_DEVICECHANGE window message.
It seems that the application must be run in the GUI subsystem, i.e. you can’t use the unit in a console program.