>>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?
>
>If it is just the device id that you need, maybe something like this can give you a starting point:
>
>

>clear
>loLocator			= CREATEOBJECT('WBEMScripting.SWBEMLocator')
>loWMI				= loLocator.ConnectServer()
>loDevices			= loWMI.ExecQuery('Select * from Win32_USBControllerDevice')
>
>for each loDevice in loDevices
>	try
>		loDependent			= GETOBJECT("winmgmts:" + loDevice.Dependent)
>		? loDependent.Status, 'DeviceID: ', loDependent.DeviceID, 'Description: ', loDependent.Description, loDependent.Name
>	catch to loException
>		? 'Exception: ', loException.Message
>	endtry
>endfor
>

I think I need the device ID to be able to communicate with the device. Now I already got the device ID, or instance handle, now the challenge is that I need to send a string like "$time?[EOL]" to the device and supposedly I need to get a return value. Similar like we did with the serial port, but then we used an active X control to do that, so it was much easier to implement.