Hello, 
     I must make a program on Visual C++, on windows
XP, using USB 6008 and 9211. I saw that because of the latter, I had to
use NI-DAQmx Base 2.2. 
     On NI-DAQmx Base Device List (lsdaq), they are both referenced as follows: 
 
     NI USB-9211: "Dev1" (USB0:: 0x3923: 0x70A3: 00E019AC:: RAW) 
     NI USB-6008: "Dev2" (USB0:: 0x3923: 0x717A: 011C22D6:: RAW) 
    
Using the examples provided and by putting even gives the value"
Dev1/ai0" in the  "chan", I have a problem with energy from this
function: 
     DAQmxErrChk (DAQmxBaseCreateAIVoltageChan (taskHandle, chan, "", DAQmx_Val_Cfg_Default, min, max, DAQmx_Val_Volts, NULL)); 
 
     Or the console says: Error DAQmxBase: <err> Device identifier is invalid. 
     Could you help me solve this problem? Thank you in advance, 
           Christophe