National Instruments NI-488.2 - Manual (Page 52)

Chapter 4 Developing Your NI-488.2 Application
© National Instruments Corporation 4-15 NI-488.2 User Manual
To compile and link a Win32 console application named cprog in a DOS
shell using the environment variable, "NIEXTCCOMPILERSUPP" , type in
the following on the command line:
bcc32 -I"%NIEXTCCOMPILERSUPP%\include" -w32 cprog.c
"%NIEXTCCOMPILERSUPP%\lib32\borland\ni4882.obj"
Borland/CodeGear does not have a 64-bit compiler at the time of this
writing.
Visual Basic (Version 6.0)
With Visual Basic, you can access the traditional NI-488.2 calls as
subroutines, using the BASIC keyword
CALL followed by the traditional
NI-488.2 call name, or you can access them using the il set of functions.
With some of the NI-488.2 calls (for example ibrd and Receive ), the
length of the string buffer is automatically calculated within the actual
function or subroutine, which eliminates the need to pass in the length as
an extra parameter. For more information about function syntax for Visual
Basic, refer to the NI-488.2 Help. For instructions on accessing the online
help, refer to the
Using the NI-488.2 Documentation section in About This
Manual .
Before you run your Visual Basic application, include the niglobal.bas
and vbib-32.bas files in your application project file.
Direct Entry with C
Direct entry is available for only the 32-bit gpib-32.dll , and not for
ni4882.dll .
The following sections describe how to use direct entry with C.
gpib-32.dll Exports
gpib-32.dll exports pointers to the global variables and all of the
NI-488.2 calls. Pointers to the global variables ( ibsta , iberr , ibcnt ,
and ibcntl ) are accessible through these exported variables:
int *user_ibsta;
int *user_iberr;
int *user_ibcnt;
long *user_ibcntl;
Except for the functions that have string parameters such as ibfind ,
ibrdf , and ibwrtf , all the NI-488.2 call names are exported from