National Instruments NI-488.2 ユーザーズマニュアル

support 16-bit wide characters, use only the 8-bit ASCII versions, named 

ibbnaA

, 

ibfindA

, 

ibrdfA

, and 

ibwrtfA

. The Unicode versions are 

named 

ibbnaW

, 

ibfindW

, 

ibrdfW

, and 

ibwrtfW

. You can use either the 

Unicode or ASCII versions of these functions with Windows 2000/NT, but 
only the ASCII versions with Windows 98/95.

In addition to pointers to the status variables and a handle to the loaded 

gpib-32.dll

, you must define the direct entry prototypes for the 

functions you use in your application. For the prototypes for each function 
exported by 

gpib-32.dll

, refer to the NI-488.2 online help. For 

instructions on accessing the online help, refer to the 

 section in 

.

The direct entry sample programs illustrate how to use direct entry to 
access 

gpib-32.dll

. For more information about direct entry, refer to the 

online help for your development environment.

Make sure that the following lines are included at the beginning of your 
application:

#ifdef __cplusplus

extern "C"{

#endif

#include <windows.h>

#include "decl-32.h"

#ifdef __cplusplus

}

#endif

In your Win32 application, you need to load 

gpib-32.dll

 before 

accessing the 

gpib-32.dll

 exports. The following code fragment shows 

you how to call the 

LoadLibrary

 function to load 

gpib-32.dll

 and 

check for an error:

HINSTANCE Gpib32Lib = NULL;

Gpib32Lib=LoadLibrary("GPIB-32.DLL");

if (Gpib32Lib == NULL) {

   return FALSE;

}