Microsoft Visual C - HP 85097A User Manual

Electronic calibration system

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Software Programming Interface

Microsoft Visual C++

This section provides hints about programming in the Microsoft C++

environment.

An example of the Visual C++ program is provided in the

<root ecal>\ install directory under examples\cpp\.

Read the ﬁle example_cpp.txt for a walkthrough of how to build the

basic skeleton in C++ code.

A workspace complete with all source ﬁles is provided under

<root ecal>\examples\cpp.

Please note that <root ecal>\examples\cpp has several hard-coded

NOTE

values, such as the type and logical number of the HP-IB (IEEE-488)

card, VNA address, and so forth. You need to recompile the application

for your speciﬁc setup to have it work for your application.

The hard-coded values of interest appear in line 199 of

spi_exampleDlg.cpp:

board_type=2;

board_num=0;

vna_address=16;

printer_port=1;

These hard-coded values specify a National Instruments IEEE-488 card

with parallel port one. If your system values do not match, correct the

values. Then you must recompile the example to make it work. Refer

to"CONFIG" on page

3-19.

Some BSTR conversion functions are provided in the example code to

make accessing the OLE object easier. Please note that the

MakeBstrFromStr function allocates memory, which the caller must

deallocate when ﬁnished using the string. Refer to the example code

and example_cpp.txt for more information.

Chapter 3

3-7

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