读写注册表

读：C/C++ code
#include <afx.h>
#include <windows.h>
#include <iostream>
#include <string>
#include <fstream>
using namespace std;

int main()
{
HKEY hKEY;
LPCTSTR data_Set="SOFTWARE//Microsoft//WZCSVC//Parameters//Interfaces//{2DA2A52D-F802-4DE6-B192-4B99AF59CA2A}//";
long ret=::RegOpenKeyEx(HKEY_LOCAL_MACHINE,data_Set,0,KEY_READ,&hKEY);//打开表项
if(ret!=ERROR_SUCCESS)
{
cerr<<"错误：无法打开有关的hKEY"<<endl;
exit(1);
}

LPBYTE result=new BYTE[128];
DWORD type=REG_BINARY;//二进制类型
DWORD len=128;//定义数据长度

ret=::RegQueryValueEx(hKEY,"ActiveSettings",NULL,&type,result,&len);//查询项值
if(ret!=ERROR_SUCCESS)
{
cerr<<"错误：无法查询有关的注册表信息"<<endl;
exit(1);
}

ofstream out("reg", fstream::out|fstream::binary);//保存项值的文件
if(!out)
{
cerr<<"reg.txt error"<<endl;
exit(1);
}

out<<result;//写出项值

delete [] result;//释放
::RegCloseKey(hKEY);//关闭表项

return 0;
}

写：

C/C++ code
#include <afx.h>
#include <windows.h>
#include <iostream>
#include <string>
#include <fstream>
using namespace std;

int main()
{
HKEY hKEY;
LPCTSTR data_Set="SOFTWARE//Microsoft//WZCSVC//Parameters//Interfaces//{2DA2A52D-F802-4DE6-B192-4B99AF59CA2A}//";

FILE* fp = fopen("reg", "rb");//打开文件
if(!fp)
{
cerr<<"reg.txt error"<<endl;
exit(1);
}
DWORD start = ftell(fp);
fseek(fp, 0, SEEK_END);
DWORD len = ftell(fp) - start;//获得文件大小
fseek(fp, start, SEEK_SET);

cout<<len<<endl;
LPBYTE data = new BYTE[len];
fread(data, len, 1, fp);

DWORD type =REG_BINARY;//二进制类型
LONG ret=::RegOpenKeyEx(HKEY_LOCAL_MACHINE,data_Set,0,KEY_WRITE,&hKEY);//打开表项
if(ret!=ERROR_SUCCESS)//如果无法打开hKEY,则中止程序的执行
{
cerr<<"错误：无法打开有关的hKEY"<<endl;
exit(1);
}

ret=::RegSetValueEx(hKEY,"ActiveSettings",NULL,type,data,len);//写项值
if(ret!=ERROR_SUCCESS)
{
cerr<<"错误：无法设置有关的注册表信息"<<endl;
exit(1);
}

delete [] data;
::RegCloseKey(hKEY);

return 0;
}