Undefined external error messages compiling in Borland C++ IDE

[Scott Allen]

I'm using:

Win95 machine
Ni-daq 6.9.1
NI PCI-6025e DAQ card
Borland C++ Builder 5.0.12.34

When I try to compile my c project I get the following error:

[Linker Error] Unresolved external 'DIG_Out_Prt' referenced from C:\SCOTT\DLL_CODE\ELLIPSE_TEST1\WRITETOPB.OBJ

Here is the code I'm attempting to build:

#include
#include
#include
#include "c:\Program Files\National Instruments\Ni-daq\Include\nidaq.h"

__declspec(dllexport) long portWrite(void);

long portWrite(void){
long value;
long status;

value=(0x0001);
status=DIG_Out_Prt(1,2,value);

return status;
}

It is some very simple code just to test that I can get t
hese ni-daq functions to work in a dll that I can access from LabVIEW.

I found the knowledgebase article at this address (but either I can't follow it or it just does not solve the problem):

http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/c1c5214a711a57
a2862562bb00067373?OpenDocument

Another thing that I found strange is that in nidaq.h the function is not DIG_Out_Prt (as stated in the user manual, and the example) but rather DIG_Out_Port. I don't understand the discrepancy.

As well I'm not sure if I should be configuring the port in my C code if I've already configured it in MAX.

Any insight or help with these matters would be greatly appreciated.

Thanks,

Scott Allen

[Chris Matthews]

I can tell you that you do need to configure the board programmatically, not in MAX. The current C DAQ library does not support MAX configuration.

This forum is for discussion of Measurement Studio for Visual C++ and not for general C++ discussion. You would get a better response to this question if you posted it in the Multifunction IO or Digital IO section of Developer's Exchange.

Best Regards,

Chris Matthews
Measurement Studio Support Manager