为什么重启机器后,我写的注册表信息就丢失了?

2003-08-26 10:09:11 277 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

使用模拟工具Modbus poll 和PLC 通讯使用模拟工具Modbus poll 和PLC 通讯简介 Modbus Poll 是一个模拟Modbus 主站的工具。不用在现场调试，在家也能使用，方便快捷的调试验证程序。使用它可以和PLC进行Modbus TCP /RTU 通讯等功能，接下来为大家介绍使用Modbus Poll 和 PLC 进行 Modbus TCP 通讯。组态PLC PLC作为我们的从站和Modbus Poll 通讯，那我们组态一个PLC。创建通信DB 创建一个DB块，在数据类型处输入：TCON_IP_V4 阅读详情

CRegistry reg;
BOOL bReturn;
DWORD dw=10,dw2;
CString s;
int i=1,j;
bReturn=reg.Open ("Software\0");
bReturn= reg.CreateKey ("vckbase\0");
bReturn=reg.Open("vckbase\0");
bReturn= reg.Write ("name","hahahaha");
// bReturn=reg.Write("name","erio");
bReturn= reg.Write ("age",i);
bReturn= reg.Write ("sarary",dw);
bReturn=reg.Read ("name",&s);
reg.Close();
AfxMessageBox(s);

...全文

Chronos：学习时间序列的大语言模型（论文解读）《Chronos：学习时间序列的大语言模型》论文翻译阅读详情

newhero

VC/MFC 16,550 成员 421,606 内容

+ 关注 + 加入社区

切换为时间正序

newhero 2003-08-26

打赏
举报

我看的2001年4月的MSDN

newhero 2003-08-26

打赏
举报

可能是我们看的MSDN的版本不同,我的MSDN写到
dwOptions
[in] Ignored; set to 0 to ensure compatibility with future versions of Windows CE.
就这么一点.

曾经的猎狐 2003-08-26

打赏
举报

dwOptions
[in] Specifies special options for the key. This parameter can be one of the following values. Value Meaning
REG_OPTION_NON_VOLATILE This key is not volatile; this is the default. The information is stored in a file and is preserved when the system is restarted. The RegSaveKey function saves keys that are not volatile.
REG_OPTION_VOLATILE Windows NT/2000/XP: All keys created by the function are volatile. The information is stored in memory and is not preserved when the corresponding registry hive is unloaded. For HKEY_LOCAL_MACHINE, this occurs when the system is shut down. For registry keys loaded by the RegLoadKey function, this occurs when the corresponding RegUnloadKey is performed. The RegSaveKey function does not save volatile keys. This flag is ignored for keys that already exist.
Windows 95/98/Me: This value is ignored. If REG_OPTION_VOLATILE is specified, the RegCreateKeyEx function creates nonvolatile keys and returns ERROR_SUCCESS.

REG_OPTION_BACKUP_RESTORE Windows NT/2000/XP: If this flag is set, the function ignores the samDesired parameter and attempts to open the key with the access required to backup or restore the key. If the calling thread has the SE_BACKUP_NAME privilege enabled, the key is opened with ACCESS_SYSTEM_SECURITY and KEY_READ access. If the calling thread has the SE_RESTORE_NAME privilege enabled, the key is opened with ACCESS_SYSTEM_SECURITY and KEY_WRITE access. If both privileges are enabled, the key has the combined accesses for both privileges.

MSDN上的原封不动的给你拿来了，是你自己没有查清楚

曾经的猎狐 2003-08-26

打赏
举报

newhero 2003-08-26

打赏
举报

非常感谢,已经成功了,打算给你100分
不过再问一个问题,我在MSDN上都没有查到用什么参数,你是怎么知道的?

bcpl 2003-08-26

打赏
举报

说错了，REG_OPTION_VOLATILE才会重启即丢失，REG_OPTION_NON_VOLATILE为永久保存。

newhero 2003-08-26

打赏
举报

请问bcpl(戒烟直到五颗星) 应该用什么参数呢?我在MSDN没有查到
感谢!!

bcpl 2003-08-26

打赏
举报

如果RegCreateKeyEx用了REG_OPTION_NON_VOLATILE参数则有此现象

newhero 2003-08-26

打赏
举报

WRITE函数如下
BOOL CRegistry::Write(LPCTSTR lpValueName, LPCTSTR lpValue)
{
ASSERT(m_hKey);
ASSERT(lpValueName);
ASSERT(lpValue);

long lReturn=RegSetValueEx(m_hKey,lpValueName,0L,REG_SZ,(const BYTE *) lpValue,strlen(lpValue)+1);

if(lReturn==ERROR_SUCCESS)
return TRUE;

return FALSE;

}

为什么重启机器后,我写的注册表信息就丢失了?

相关推荐