Data Read event in DAQmx with VB6

Hi,
I'm new to NI-DAQmx, I'll develop DAQ applications with VB.Net and DAQmx but feel maybe it's better to try with VB6 first. I've looked at the examples for DAQmx 7.5 using VB6, but have not been able to find an equivalent event to the CWAI_AcquiredData(,) event for the activeX controls in traditional NI-DAQ. My applications will continuously acquire analog data and should parse data in such an event if there is one.
Look forward to your advice.
Thank you in advance,
LogicT

Hello LogicT
Microsoft provides a free book that will guide users who are upgrading
to VB.NET. It's pretty comprehensive and can be downloaded for offline
reading. See this link for more information. Get 'em while they're hot
For the VB 6.0 type library appraoch, you could use the DAQmxRegisterEveryNSamplesEvent function to register
for a synchronous event to inform you when a certain number of samples
have been acquired. You could then call the read function inside of
this event. Or you could just call the read in a loop with
Application.DoEvents. But this latter approach might cause UI
delays,especially if your sampling rate is slow and it takes a while to
acquire the data.
But honestly, if the ultimate goal is to move to VB.NET, then I would
not recommend the approach you're taking. The DAQmx API for .NET is a
native .NET library. The documentation for it is integrated into the
Visual Studio Help system. There are alot more shipping examples and
concept documents for the .NET library then there are for the VB 6.0
type library for DAQmx. Trying to make a direct conversion from the VB
6.0 type library application to a VB.NET app will not provide you with
optimal results. If the end goal is to have a VB.NET DAQmx
application, I would recommend starting in VB.NET. Use the book I
mentioned above as a starting resource. The example you're looking for
is under ..\DotNET\Examples\DAQmx\Analog In\Measure
Voltage\ContAcqVoltageSamples_IntClk
PS: Even thought the path mentioned by E.Lee has Measurement Studio in
there, you do not need to purchase Measurement Studio to get the .NET
DAQmx API. It is available as part of the DAQmx driver for free. The
Help and examples are all included.
I hope this helps
Bilal Durrani
NI

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1) There is an un-written rule that says more "stars" is better than just one star. Giving a one star rating will probably eliminate that responder from individuals that are willing to anser your question.
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