>We have a software that accesses the diabetes glucose meters via a serial port.
>Now they are introducing a new meter that has a USB connection. The way to access the meters needs to be done enumerating the USB devices and recognizing the meter by its device ID.
>
>I looked around for code that does the enumeration, but nothing that can simply be used in a VFP application.
>
>I wonder if there is an API or another third party interface that I could use in VFP?

Looks like this http://stackoverflow.com/questions/13927475/windows-how-to-enumerate-all-connected-usb-devices-device-path can get you started

There's a link to a C program towards the end http://www.velleman.eu/images/tmp/usbfind.c