那些你用的到的C++注册表操作

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获取注册表信息

以获取cpu信息为例

long lRet;
HKEY hKey;
TCHAR tcData[64];
DWORD dwSize;

lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
    _T("HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0"),
    0,
    KEY_QUERY_VALUE,
    &hKey
);

if (lRet == ERROR_SUCCESS)
{
    lRet = RegQueryValueEx(hKey,
        _T("ProcessorNameString"),
        NULL,
        NULL,
        (LPBYTE)tcData,
        &dwSize
        );
    if (lRet == ERROR_SUCCESS)
    {
        SetDlgItemText(IDC_STATIC_CPU, tcData);
    }
    else
    {
        AfxMessageBox(_T("RegQueryValueEx failed."));
    }
}
else
{
    AfxMessageBox(_T("RegOpenKeyEx failed."));
}

RegCloseKey(hKey);

获取的是字符串的方式

LONG lValue;
RegQueryValue(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\test"), NULL, &lValue);
TCHAR *pBuf = new TCHAR[lValue];
RegQueryValue(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\test"), pBuf, &lValue);
AfxMessageBox(pBuf);

获取的是DWORD数值型的

HKEY hKey;
RegOpenKey(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\test"), &hKey);
DWORD dwType;
DWORD dwValue;
DWORD dwAge;
RegQueryValueEx(hKey, _T("age"), 0, &dwType, (LPBYTE)&dwAge , &dwValue);
CString str;
str.Format(_T("age = %d"), dwAge);
AfxMessageBox(str);

方式2

long lRet;
HKEY hKey;
DWORD dwAge;
DWORD dwSize;

lRet = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
    _T("SOFTWARE\\test"),
    0,
    KEY_QUERY_VALUE,
    &hKey
);

if (lRet == ERROR_SUCCESS)
{
    lRet = RegQueryValueEx(hKey,
        _T("age"),
        0,
        NULL,
        (LPBYTE)&dwAge,
        &dwSize
    );
    if (lRet == ERROR_SUCCESS)
    {
        CString str;
        str.Format(_T("age = %d"), dwAge);
        AfxMessageBox(str);
    }
    else
    {
        AfxMessageBox(_T("RegQueryValueEx failed."));
    }
}
else
{
    AfxMessageBox(_T("RegOpenKeyEx failed."));
}

RegCloseKey(hKey);

写入注册表

HKEY hKey;
//DWORD dw;
//RegCreateKeyEx(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\test"), 0, REG_NONE, REG_OPTION_NON_VOLATILE, KEY_WRITE | KEY_READ, NULL, &hKey, &dw);
//RegSetValueEx(hKey,_T("name") , 0, REG_SZ, (LPBYTE)_T("giantbranch"), 22);
RegCreateKey(HKEY_LOCAL_MACHINE, _T("SOFTWARE\\test"), &hKey);
//增加默认
RegSetValue(hKey, NULL, REG_SZ, _T("giantbranch"), 11);
DWORD dwAge = 30;
RegSetValueEx(hKey, _T("age"), 0, REG_DWORD, (CONST BYTE *)&dwAge, 4);
RegCloseKey(hKey);