You can't access USB devices (or any other device) directly from user mode
applications in windows, this is done by the Device driver. The software
that came with the device includes a Device driver, a COM library and a VB
sample. The VB sample uses the interface exposed by the COM library, if you
want to build new (with extended functionality) applications using C#, you
have to import the typelibrary to access the same COM object from managed
code, However, if you meant that the functionality offered by the library is
rather limitted, you will have to call Device driver API directly from C++
or C#(using Pinvoke), but it's obvious you will need the API's
documentation.
Willy.
That all looks good, thanks, the device I have works well
with the software that came with the device, but it's
limited, so I thought I might try to write my own software.
The driver came with the Device and a Visual basic program
and some Visual Basic 5.0 examples, so I don't have to
write the driver. Just trying to write a program in C#, as
I don't know much about Visual Basic. If you are interested
in the device I'm trying to write a program for, here is
the link. Thanks Again.
Bradley
http://www.bb-elec.com/product.asp?sku=UD128A8D&PathId=40&altsku=daqaichart