win32 注册表操作API

你的名字 2022-11-12 11:50 279阅读 0赞

# 前言 #

注册表是windows提供给开发者存储轻量级数据的地方。我们可以通过键入`regedit`打开注册表.

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70]  
我们首先像`HKEY_CURRENT_USER\Software\\QQBrowse`r写入一个`value`值的一个案例

int main()
    {
        
    	HKEY openkey = NULL;
    	//打开或者创建一个注册表key
    	LONG nRet = RegCreateKey(HKEY_CURRENT_USER, "Software\\QQBrowser", &openkey);
    
    	if (nRet != ERROR_SUCCESS)
    	{
        
    		cout << "创建失败" << endl;
    		return EXIT_FAILURE;
    	}
    	char ou[] = "hello my value ";
    	//像打开的注册表key句柄写入一个hello为键  hello my value 为值的item
    	//REG_SZ标识写入的类型
    	int reult = RegSetValueEx(openkey, "hello", 0, REG_SZ, (CONST BYTE*)ou, sizeof(ou));
    	
    	if (reult != ERROR_SUCCESS)
    	{
        
    		cout << "写入失败" << endl;
    		return EXIT_FAILURE;
    	}
    	return 0;
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 1]

# 删除注册表的某一个键 #

int main()
    {
        
    	HKEY openkey = NULL;
    
    	LONG nRet = RegCreateKey(HKEY_CURRENT_USER, "Software\\QQBrowser", &openkey);
    
    	if (nRet != ERROR_SUCCESS)
    	{
        
    		cout << "创建失败" << endl;
    		return EXIT_FAILURE;
    	}
    	char ou[] = "hello my value ";
    
    
    	nRet = RegDeleteKey(HKEY_CURRENT_USER, "Software\\QQBrowser");
    
    	if (nRet != ERROR_SUCCESS)
    	{
        
    		cout << "RegDeleteKey失败" << endl;
    		getchar();
    		return EXIT_FAILURE;
    	}
    }

# 删除键下面的一个value #

HKEY openkey = NULL;
    
    	LONG nRet = RegCreateKey(HKEY_CURRENT_USER, "Software\\alipay、", &openkey);
    
    	if (nRet != ERROR_SUCCESS)
    	{
        
    		cout << "创建失败" << endl;
    		return EXIT_FAILURE;
    	}
    	
    	nRet = RegDeleteValue(openkey, "alipay");
    	if (nRet != ERROR_SUCCESS)
    	{
        
    		cout << "RegDeleteValue" << endl;
    		return EXIT_FAILURE;
    	}

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 2]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 3]

# 遍历子键和value #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 4]

int main()
    {
        
    	HKEY openkey = NULL;
    
    	LONG nRet = RegCreateKey(HKEY_CURRENT_USER, "Software\\Tencent", &openkey);
    
    	if (nRet != ERROR_SUCCESS)
    	{
        
    		cout << "创建失败" << endl;
    		return EXIT_FAILURE;
    	}
    
    
    
    	DWORD dwIndex = 0, NameSize = 0, NameCnt = 0, MaxNameLen = 0, Type = 0;
    	DWORD KeySize = 0, KeyCnt = 0, KeyMaxLen = 0, DateSize = 0, MaxDateLen = 0;
    
    	if (RegQueryInfoKey(openkey, 
    		NULL,
    		NULL, 
    		NULL,
    		&KeyCnt, //这个键下面的子键数量
    		&KeyMaxLen, //子键名字中最长的名字长度 
    		NULL,
    		&NameCnt,//这个键的value的数量
    		&MaxNameLen,//这个键的所有value中最长的名字长度
    		&MaxDateLen, //所有的value对应的存储数值最大的长度
    		NULL,
    		NULL) != ERROR_SUCCESS)
    	{
        
    		cout << "RegQueryInfoKey 失败" << endl;
    
    	}
    
    	char *keyName = new char[KeyMaxLen + 1];
    	for (size_t i = 0; i < KeyCnt; i++)
    	{
        
    		
    		DWORD dwKeyNameLen= KeyMaxLen+1;
    		int result = RegEnumKeyEx(openkey, i, keyName, &dwKeyNameLen, 0, NULL, NULL, NULL);;
    		if (result != ERROR_SUCCESS)
    		{
        
    			cout << "RegEnumKeyEx 失败" << endl;
    			getchar();
    			return EXIT_FAILURE;
    		}
    		cout << i<<"\t"<<keyName << endl;
    	}
    	delete []keyName;
    
    	RegCloseKey(openkey);
    
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 5]

int main()
    {
        
    	HKEY openkey = NULL;
    
    	LONG nRet = RegCreateKey(HKEY_CURRENT_USER, "Software\\Tencent", &openkey);
    
    	if (nRet != ERROR_SUCCESS)
    	{
        
    		cout << "创建失败" << endl;
    		return EXIT_FAILURE;
    	}
    
    
    
    	DWORD dwIndex = 0, NameSize = 0, NameCnt = 0, MaxNameLen = 0, Type = 0;
    	DWORD KeySize = 0, KeyCnt = 0, KeyMaxLen = 0, DateSize = 0, MaxDateLen = 0;
    
    	if (RegQueryInfoKey(openkey, 
    		NULL,
    		NULL, 
    		NULL,
    		&KeyCnt, //这个键下面的子键数量
    		&KeyMaxLen, //子键名字中最长的名字长度 
    		NULL,
    		&NameCnt,//这个键的value的数量
    		&MaxNameLen,//这个键的所有value中最长的名字长度
    		&MaxDateLen, //所有的value对应的存储数值最大的长度
    		NULL,
    		NULL) != ERROR_SUCCESS)
    	{
        
    		cout << "RegQueryInfoKey 失败" << endl;
    
    	}
    
    	char *keyName = new char[MaxNameLen+1];
    	char *valueName = new char[MaxDateLen+1];
    
    	for (size_t i = 0; i < NameCnt; i++)
    	{
        
    		DWORD dwKeyNameLen = MaxNameLen+1;
    		DWORD dwKeyNameLen2 = MaxDateLen+1;
    
    		nRet = RegEnumValue(openkey, i, keyName, &dwKeyNameLen, 0, NULL, (LPBYTE)valueName, &dwKeyNameLen2);;
    		if (nRet != ERROR_SUCCESS)
    		{
        
    			cout << "RegEnumKeyEx 失败" << endl;
    			return EXIT_FAILURE;
    		}
    		cout << i << "\t" << keyName << "\t " << valueName << endl;
    	}
    	delete[]keyName;
    	delete[]valueName;
    
    	RegCloseKey(openkey);
    
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 6]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70]: /images/20221022/dbef616610494597aaebee98f2da0bec.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 1]: /images/20221022/6bd53da322d54ac9a15a509682cea45b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 2]: /images/20221022/026bf60e8e9846fd83887d755721c8a4.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 3]: /images/20221022/716e7dd8ce464d9480e5c2eda837781b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 4]: /images/20221022/8d25b6cce3f14330b9a3509e32fa8c65.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 5]: /images/20221022/48f6ce16dc4445a993d846e090dfd598.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FmYW5taW5neWlx_size_16_color_FFFFFF_t_70 6]: /images/20221022/f57ad48d8f8c4d42a402d81d9a7c3e41.png