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Notification to a running application of a USB device connecting to the computer.
Posted on 2013-01-25
hi - i'm using VS2010 and .net 4 running on Windows 7. I want my app to respond to a specific usb device being connected to the computer - while the app is running. is there an event that i can trap? can you provide some code that would show how the call back would work?
the usb device is of my making, so i have some control over the device protocol. however it uses the ftdi chip to control the enumeration, so i don't have control over the device driver. it instantiates as a USB serial device. The actual device is an Arduino Nano.
thanks,
the usb device is of my making, so i have some control over the device protocol. however it uses the ftdi chip to control the enumeration, so i don't have control over the device driver. it instantiates as a USB serial device. The actual device is an Arduino Nano.
thanks,
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3 Comments
you can periodically scan for new drives.
http://msdn.microsoft.com/en-us/library/system.io.driveinfo.getdrives.aspx
http://msdn.microsoft.com/en-us/library/system.io.driveinfo.getdrives.aspx
thanks, but this shows up as a serial device (COM port). i suppose i could scan for a new COM port using the serial.ports but i would rather try and get a notification.
There's a device change notification via the Win32_DeviceChangeEvent WMI provider. However, this provider doesn't really tell if a new device is connected via USB right away. You can enumerate USB devices via Win32_USBControllerDevice and see what's changed.
It may be easier to just pinvoke RegisterDeviceNotification
It may be easier to just pinvoke RegisterDeviceNotification
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