how to communicate with usb port using vb

[sayantan]

i want to communicate with a usb device using vb.
can anyone help me out with the details.
it would be very helpful

[TcM]

i want to communicate with a usb device using vb.
can anyone help me out with the details.
it would be very helpful

Depends what USB device is! If it's a webcam you need one way, if its a printer its another thing! whats your device be more specific if you want help!

[s3092956]

im connecting a bluetooth dongle to the USB, which will communicate with a remote bluesmirf bluetooth module.
I also need to know how to communicate with the USB port.

[LeoZao]

Hello all

I am trying to manage an USB CF card in order to detect the error messages and to make re-init (restart) of the card i case of some unexpected errors. Any example could help me.

Thank you!

[Xav]

You could try looking for an API to automate.

[LeoZao]

I am using API but this is not working with a CF card. Actually i am using the functions CreateFile and DeviceIoControl. This for eject and reopen the CF card. Do you recommend me something else?

Also i implemented a solution using devcon.exe but this also is not so convenient because i like to have a more silent re-init of the cf card.

Thank you!

[Xav]

Every manufacturer creates its own APIs, so they aren't directly part of the language. Therefore, they can be badly written, or indeed not working properly at all.

Try checking the DOM documentation for details on which classes are available.

[LeoZao]

Thank you Xav for you answers...

The problem is that there is not a specific manufacturer for the CF cards i use. What i want is to make something general for the USB mass storage devices (especially for memory cards: CF, MMC, SD, MiniSD)

[Xav]

What sort of error messages do you want to handle?

[LeoZao]

For the beginning it will be good if i will manage to reset the mass storage device (stop and start or some kind of re-init) or something like this. After i will think to manage the errors. I am thinking to catch some errors. The errors which i want to handle could appear while i will transfer the data into the card.