如何读取注册表项值 [英] How do I read Registry Key Value
本文介绍了如何读取注册表项值的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我使用以下代码创建注册表项:
LPCTSTR lpNDS = TEXT(SOFTWARE\\myKEY );
if(OK == ERROR_SUCCESS)
{
MessageBox(NULL,Success,
_T(SimpleShlExt),
MB_ICONINFORMATION);
}
else
{
MessageBox(NULL,Failed,
_T(SimpleShlExt),
MB_ICONINFORMATION);
}
LONG openRes = RegCreateKeyEx(
HKEY_LOCAL_MACHINE,
lpNDS,
0,
NULL,
REG_OPTION_NON_VOLATILE,
KEY_ALL_ACCESS,
NULL,
& hRegKey,
NULL);
if(openRes!= ERROR_SUCCESS)
MessageBox(NULL,注册表创建失败,
_T(SimpleShlExt),
MB_ICONINFORMATION);
现在我使用以下命令写入密钥:
pre>
CSimpleShlExt :: WriteToRegistry(LPSTR lpRegKeyVal)
{
LONG setRes = RegSetValueEx(hRegKey,NDS,0,REG_SZ,(LPBYTE)lpRegKeyVal, strlen(lpRegKeyVal)+1);
CloseRegistryKey();
}
现在我正在尝试读取我的注册表项值使用 WriteToRegistry
函数创建。我试过了
RegOpenKeyEx(hRegKey,lpNDS,0,KEY_QUERY_VALUE,& hRegKey);
但这是失败。
函数应该用来读取键中包含的值?
解决方案
您可以尝试类似:
TCHAR szValue [TEMP_STR_SIZE] = {0};
DWORD dwStorageSize = TEMP_STR_SIZE;
LPBYTE lpStorage = reinterpret_cast< LPBYTE>(szValue);
//在注册表值检索失败的情况下
if(ERROR_SUCCESS!= RegQueryValueEx(hRegKey,_T(NDS),0,0,lpStorage,& dwStorageSize))
{
//提示错误
}
编辑:
只是注意到没有子项,更改了我的示例代码
I am Creating the Registry Key using following code:
LPCTSTR lpNDS= TEXT("SOFTWARE\\myKEY");
if(OK==ERROR_SUCCESS)
{
MessageBox ( NULL, "Success",
_T("SimpleShlExt"),
MB_ICONINFORMATION );
}
else
{
MessageBox ( NULL, "Failed" ,
_T("SimpleShlExt"),
MB_ICONINFORMATION );
}
LONG openRes = RegCreateKeyEx(
HKEY_LOCAL_MACHINE,
lpNDS,
0,
NULL,
REG_OPTION_NON_VOLATILE,
KEY_ALL_ACCESS,
NULL,
&hRegKey,
NULL);
if (openRes!=ERROR_SUCCESS)
MessageBox ( NULL, "Registry Createion Failed",
_T("SimpleShlExt"),
MB_ICONINFORMATION );
Now I am writing up to the Key using:
CSimpleShlExt::WriteToRegistry(LPSTR lpRegKeyVal)
{
LONG setRes = RegSetValueEx (hRegKey, "NDS", 0, REG_SZ, (LPBYTE)lpRegKeyVal, strlen(lpRegKeyVal)+1);
CloseRegistryKey();
}
Now I am trying read the registry key value that I have created using WriteToRegistry
function. I have tried with
RegOpenKeyEx(hRegKey,lpNDS,0,KEY_QUERY_VALUE,&hRegKey);
But this is failing.
Which function shall I use to read the value contained inside the key?
解决方案
You can try something like :
TCHAR szValue[TEMP_STR_SIZE] = {0};
DWORD dwStorageSize = TEMP_STR_SIZE;
LPBYTE lpStorage = reinterpret_cast<LPBYTE>(szValue);
// In case of registry value retrieval failure
if (ERROR_SUCCESS != RegQueryValueEx(hRegKey, _T("NDS"), 0, 0, lpStorage, &dwStorageSize))
{
// Prompt error
}
Edit:
Just noticed there are no subkey, changed my sample code
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