Howdy Sajjad -
It sounds as if you are familiar with our old CWDAQ ActiveX controls. These, however, are no longer used with DAQmx. There is, in contrast, a native API which you can use to program in Visual Basic 6.0. You can find some examples under <NI-DAQ installation dir>\Examples\Visual Basic 6.0\.
Let me know if that folder does not exist.
Do you have any other Measurement Studio ActiveX controls installed (such as cwGraph, for example)? Are you able to see those controls in Visual Basic 6.0, or are you experiencing problems with Measurement Studio user interface controls as well?
I look forward to your answers. Have a great day!
Regards,
Andrew W || Applications Engineer
National Instruments