pointer to a 32 byte buffer

[Mathan]

Dear all,

I need to initialize a dll parameter like this - a pointer to a 32 byte array.

Could somebody please tell how to configure that?

Thanks,

Mathan

[Mathan]

Dears,

In the attached dll, am using scardstatusa function. In initializing its parameters, am struggling with the last two parameters. details

[Mathan]

Attachment probs in last post.

Here look for details

[GerdW]

Hi mathan,

what about wiring an U8 array with length of 32?

[Mathan]

Hi Gerdw,

You mean like this????

Thanks,

Mathan

[Mathan]

But if i did like what i have attached it comes up with the following error that i have attached and the application itself will get closed.(LabVIEW Crashes)

Thanks,

Mathan

[GerdW]

Hi mathan,

IMHO you should also wire the *bATR input with a predefined array ("Init array" with U8 datatype and 32 elements length)...
You only supplied the length parameter, but no pointer to the buffer itself. You have to supply this buffer! The dll call will not create it on its own, hence the error message.


Message Edited by GerdW on 05-05-2008 10:20 AM

[Mathan]

Dear GerdW,

I did like what you said, but it returns with the same error i have attached in my last post - "data buffer is too small for the returned data".

But this time there is no crash. How to proceed?

Thanks,

Mathan

[Mathan]

Dear GerdW,

see what i have done. Is it correct?

Thanks,

Mathan

[GerdW]

Hi mathan,

I would wire bPTRLen as input too - and I would make it an I32 (instead of U8) as the description speaks of "DWord"