environment.

Microsoft Visual C++ Version 6.0 Development Environment

1 Use the File menu to create a new project or open an existing project.

2 Select Project > Settings from the menu and click the C/C++ tab.

3 Select Code Generation from the Category list box and select Multi-Threaded using DLL from the Use Run-Time Libraries list box. (VISA requires these definitions for Win32.) Click OK to close the dialog box.

4 Select Project > Settings from the menu. Click the Link tab and add visa32.lib to the Object/Library Modules list box. Optionally, you may add the library directly to your project file. Click OK to close the dialog box.

5 You may want to add the include files and library files

search paths. They are set as follows:

• Select Tools > Options from the menu.

• Click the Directories tab to set the include file path.

• Select Include Files from the Show Directories For list box.

• Click at the bottom of the list box and type:

C:\Program Files\VISA\winnt\include

(This assumes that you used the default installation

location for VISA.)

• Select Library Files from the Show Directories For list box.

• Click at the bottom of the list box and type:

C:\Program Files\VISA\winnt\lib\msc

(This assumes that you used the default installation

location for VISA.)

6 Add or create your C or C++ source files. For example, to build the sample described below, select Project > Add to Project > Files… and type or browse to C:\Program Files\Agilent\IO Libraries Suite\ ProgrammingSamples\C\VISA\idn.c.

7 Click Build > Rebuild All to build the VISA program.

示例：电源型号:Agilent GPIB线 开发环境为VS2010

1.首先安装GPIB驱动，驱动安装文件比较大，请自行下载安装，我用的NI驱动

2.编写一个Win32程序，实现打开和关闭电源的功能。

主要代码如下：

//包含VISA头文件和库文件

#include "WinNT//include//visa.h"                               

#pragma comment(lib, "WinNT//lib//msc//visa32.lib")

电源初始化函数

BOOL CXXXDlg::InitPower()

{

char chStatusDesc[_MAX_DIR] = {0};
int retCnt=0;	
char instrDesc[100]={0};	
ViFindList find_list;	
float voltSetting, currSetting;
voltSetting = atof(ini_powervolt);
currSetting = atof(ini_powercurrent);
VISAstatus=viOpenDefaultRM(&defrm);
if (VISAstatus != VI_SUCCESS)
{
	return FALSE;
}
VISAstatus = viFindRsrc(defrm,"GPIB?*INSTR",&find_list,(ViPUInt32)&retCnt, instrDesc);

VISAstatus=viOpen(defrm,instrDesc, VI_NULL, VI_NULL, &session);




if (VISAstatus!=VI_SUCCESS)
{
	return FALSE;
}
//Set voltage
viPrintf(session,"VOLT %f \n",voltSetting);




//Set current level
viPrintf(session,"CURR %f \n",currSetting);
return TRUE;

}

打开电源

void CXXXDlg::OnBnClickedBtnPowerOn()

{
if (!InitPower())
{
	AfxMessageBox("Init Power Fail,Please Check the GPIB Connected!");
	return;
}




viPrintf(session,"OUTP ON \n");

}

关闭电源

void CXXXDlg::OnBnClickedBtnPoweroff()

{
if (!InitPower())
{
	AfxMessageBox("Init Power Fail,Please Check the GPIB Connected!");
	return;
}




viPrintf(session,"OUTP OFF \n");

}

上面的示例只是简单的展示了开启和关闭电源的基本功能，实际开始时需要根据具体需求来扩展。