VC++操作注册表(创建，读取，更改，删除)

#include "stdafx.h"
#include <Windows.h>
#include <iostream>

using namespace std;

/************************************
@ Brief:		打开注册表，读取Key对应value
@ Author:		woniu201
@ Created:		2018/09/07
@ Return:
************************************/
int ReadReg(char* path, char* key, char* value)
{
	HKEY hKey;
	int ret = RegOpenKeyEx(HKEY_CURRENT_USER, path, 0, KEY_EXECUTE, &hKey);
	if (ret != ERROR_SUCCESS)
	{
		cout << "打开注册表失败" << endl;
		return 1;
	}

	//读取KEY
	DWORD dwType = REG_SZ; //数据类型
	DWORD cbData = 256;
	ret = RegQueryValueEx(hKey, key, NULL, &dwType, (LPBYTE)value, &cbData);
	if (ret == ERROR_SUCCESS)
	{
		cout << value << endl;
	}
	else
	{
		cout << "读取注册表中KEY 失败" << endl;
		RegCloseKey(hKey);
		return 1;
	}
	RegCloseKey(hKey);

	return 0;
}

/************************************
@ Brief:		写注册表，如不存在自动创建
@ Author:		woniu201
@ Created:		2018/09/07
@ Return:
************************************/
int WriteReg(char* path, char* key, char* value)
{
	HKEY hKey;
	DWORD dwDisp;
	DWORD dwType = REG_SZ; //数据类型

	int ret = RegCreateKeyEx(HKEY_CURRENT_USER, path,0, NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &hKey, &dwDisp);
	if (ret != ERROR_SUCCESS)
	{
		cout << "创建注册表失败" << endl;
		return 1;
	}
	ret == RegSetValueEx(hKey, key, 0, dwType, (BYTE*)value, strlen(value));
	if (ret != ERROR_SUCCESS)
	{
		cout << "注册表中创建KEY VALUE失败" << endl;
		RegCloseKey(hKey);
		return 1;
	}
	RegCloseKey(hKey);
	return 0;
}

/************************************
@ Brief:		删除注册表
@ Author:		woniu201
@ Created:		2018/09/07
@ Return:
************************************/
int DelReg(char* path)
{
	int ret = RegDeleteKey(HKEY_CURRENT_USER, path);
	if (ret == ERROR_SUCCESS)
	{
		cout << "删除成功" << endl;
	}
	else
	{
		cout << "删除失败" << endl;
		return 1;
	}
	return 0;
}

int _tmain(int argc, _TCHAR* argv[])
{
	char value[32] = {0};
    ReadReg("Software\\Woniu", "aaa", value);

	WriteReg("Software\\Woniu", "aaa", "bbb");

	DelReg("Software\\Woniu");
	getchar();
	return 0;
}