#include "stdafx.h"
#include "addPath.h"
#define _AFXDLL
#include <afxwin.h>
#include <iostream>
#include <tchar.h>
#include <afx.h>
#include <afxpriv.h>
using namespace std ;
int AddPath(char * strPath)
{
HKEY hkResult;//键的句柄
LPCTSTR environmentKey =_T("SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment");
//HKEY_CURRENT_USER HKEY_LOCAL_MACHINE
//LPCTSTR environmentKey =_T("Environment");
if(ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE, environmentKey , 0,KEY_SET_VALUE | KEY_READ , &hkResult)) //打开键environment
{
MessageBox(NULL,_T("访问注册表出错!\n请使用管理员帐户执行本程序!"),_T("ERROR"),MB_ICONERROR);
return 0;
}
DWORD BufferSize = 8192; //数据长度
DWORD cbData; ////数据长度
DWORD dwRet;
VOID* PerfData = malloc( BufferSize );//数据存放地址
cbData = BufferSize;
LPCTSTR myVariable=_T("PATH");//环境变量
dwRet = RegQueryValueEx( hkResult,myVariable, NULL, NULL, (LPBYTE) PerfData, &cbData ); //读取某子键下特定名称的值
while (dwRet == ERROR_MORE_DATA)
{
BufferSize += 4096;
PerfData = realloc( PerfData, BufferSize );
cbData = BufferSize;
dwRet = RegQueryValueEx( hkResult,myVariable,NULL,NULL,(LPBYTE) PerfData, &cbData );
}
//MessageBox(NULL,(LPCTSTR)PerfData,_T("我的系统变量Path"),MB_OK);
if (dwRet == ERROR_SUCCESS)//名称不存在时,添加这个名称并设定其值
{
//判断是否存在myValue
if(IsPathExist(PerfData,strPath))
{
//MessageBox(NULL,_T("环境变量已经存在!"),_T("信息"),MB_OK);
RegCloseKey(hkResult);//释放键句柄
free(PerfData);
return 1;
}
LPTSTR myValueEx = new TCHAR[strlen(strPath)+1];//此处,不是用sizeof() 函数,注意区别
strcpy((char*)myValueEx,strPath);
TCHAR lastChar=((LPTSTR)PerfData)[cbData-2];//字符串以\0结尾
if(lastChar!=';')
{
strcpy((char*)myValueEx,";");
strcat((char*)myValueEx,strPath);
//printf("%s %s\n",strPath,myValueEx);
//printf("%d %d\n",strlen(strPath),strlen((char*)myValueEx));
}
CString strMyValueEx;
USES_CONVERSION;
strMyValueEx = A2T((LPCSTR)myValueEx);
//MessageBox(NULL,strMyValueEx,_T("信息"),MB_OK);
TCHAR * temp = new TCHAR[cbData+strlen((char*)myValueEx)];
_tcscpy_s(temp, cbData, (LPTSTR)PerfData);//拷贝path中原有的字符串到temp中
//printf("temp:%s\n\n",temp);
LPTSTR pathValue = _tcscat(temp, strMyValueEx); //类似memcpy
//printf("pathValue:%s\n\n",pathValue);
long setResult = RegSetValueEx(hkResult,myVariable,0, /*REG_SZ*/REG_EXPAND_SZ, (LPBYTE) pathValue,_tcsclen(pathValue)*sizeof(TCHAR));//设置某子键下特定名称的值。
DWORD dwResult;
SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE , 0,LPARAM(_T("Environment")), SMTO_ABORTIFHUNG, 5000, &dwResult);//广播立即执行
/*if(ERROR_SUCCESS == setResult)
{
MessageBox(NULL,_T("环境变量设置完成!"),_T("信息"),MB_OK);
}
else
{
MessageBox(NULL,_T("环境变量设置失败!"),_T("信息"),MB_OK);
}*/
delete []myValueEx;
delete []temp;
temp = NULL ;
}
else
{
MessageBox(NULL,_T("环境变量读取失败!"),_T("信息"),MB_OK);
}
//printf("\nEnd Register\n");
RegCloseKey(hkResult);//释放键句柄
free(PerfData);
PerfData = NULL ;
//printf("\nEnd AddPath\n");
return 1;
}
int IsPathExist(void *PerfData,char *myPath)
{
//return 0 ;
char * myoldPath = (char*)PerfData;
int i = 0 ;
while(myoldPath[i] != '\0')
{
i = i + 2 ;
}
char * path_t = new char[i/2+2];
i = 0 ;
while(myoldPath[i] != '\0')
{
path_t[i/2] = myoldPath[i];
i = i + 2 ;
}
path_t[i/2] = '\0';
path_t[i/2+1] = '\0';
CString strMyoldPath;
CString strMyPath;
USES_CONVERSION;
strMyoldPath = A2T((LPCSTR)path_t);
strMyPath = A2T((LPCSTR)myPath);
if(strMyoldPath[strMyoldPath.GetLength()-1] != ';')
{
strMyoldPath = strMyoldPath + _T(";") ;
}
if(strMyPath[strMyPath.GetLength()-1] != ';')
{
strMyPath = strMyPath + _T(";") ;
}
if(-1 == strMyoldPath.Find(strMyPath,0))
{
delete path_t;
return 0 ;
}
delete path_t;
return 1 ;
}
http://download.csdn.net/download/autumoonchina/8747921
原文链接: https://www.cnblogs.com/findumars/p/6379856.html
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