Chapter 3 Developing Your NI-488.2 ApplicationNI-488.2 User Manual for Windows 3-14 www.natinst.comsupport 16-bit wide characters, use only the 8-bit ASCII versions, namedibbnaA, ibfindA, ibrdfA, and ibwrtfA. The Unicode versions arenamed ibbnaW, ibfindW, ibrdfW, and ibwrtfW. You can use either theUnicode or ASCII versions of these functions with Windows 2000/NT, butonly the ASCII versions with Windows 98/95.In addition to pointers to the status variables and a handle to the loadedgpib-32.dll, you must define the direct entry prototypes for thefunctions you use in your application. For the prototypes for each functionexported by gpib-32.dll, refer to the NI-488.2 online help. Forinstructions on accessing the online help, refer to the Using the NI-488.2Documentation section in About This Manual.The direct entry sample programs illustrate how to use direct entry toaccess gpib-32.dll. For more information about direct entry, refer to theonline help for your development environment.Directly Accessing the gpib-32.dll ExportsMake sure that the following lines are included at the beginning of yourapplication:#ifdef __cplusplusextern "C"{#endif#include #include "decl-32.h"#ifdef __cplusplus}#endifIn your Win32 application, you need to load gpib-32.dll beforeaccessing the gpib-32.dll exports. The following code fragment showsyou how to call the LoadLibrary function to load gpib-32.dll andcheck for an error:HINSTANCE Gpib32Lib = NULL;Gpib32Lib=LoadLibrary("GPIB-32.DLL");if (Gpib32Lib == NULL) {return FALSE;}
