c++ - RegQueryValueEx 得到不正确的数据

Question

我使用此代码将注册表数据从 HKCU 复制到 HKLM。在 1-9 之间检索到正确的数字，但在 10 时我得到 a，11 时我得到 b，等等。我不知道我做错了什么，如果有任何帮助，我将不胜感激。

extern "C" UINT __stdcall ReadTempRegKey(MSIHANDLE hInstall)
{
HRESULT hr = S_OK;
UINT er = ERROR_SUCCESS;
HKEY hKey;
char szProductKey[MAX_PATH], lszValue[MAX_PATH];
TCHAR    achKey[MAX_KEY_LENGTH], achClass[MAX_PATH] = TEXT(""), achValue[MAX_VALUE_NAME];  
DWORD     cbName, cchClassName = MAX_PATH, cSubKeys=0, cbMaxSubKey, cchMaxClass, cValues, cchMaxValue, cbMaxValueData, cbSecurityDescriptor; 
FILETIME ftLastWriteTime;    
PHKEY phkResult = NULL;
DWORD i, retCode, cchValue = MAX_VALUE_NAME,dwType=REG_SZ,dwSKeyValueSize,dwSize=255;

hr = WcaInitialize(hInstall, "ReadTempRegKey");
ExitOnFailure(hr, "Failed to initialize");

WcaLog(LOGMSG_STANDARD, "Initialized.");  

Orc_Reg_Sub_LM_CU();

sprintf_s(szProductKey, "SOFTWARE\\%s",Orc_Get_Product_Name());

if( RegOpenKeyEx( HKEY_CURRENT_USER,
    szProductKey,
    0,
    KEY_READ,
    &hKey) == ERROR_SUCCESS
    )
{
    //Get the class name and the value count. 
    retCode = RegQueryInfoKey(
        hKey,                    // key handle 
        achClass,                // buffer for class name 
        &cchClassName,           // size of class string 
        NULL,                    // reserved 
        &cSubKeys,               // number of subkeys 
        &cbMaxSubKey,            // longest subkey size 
        &cchMaxClass,            // longest class string 
        &cValues,                // number of values for this key 
        &cchMaxValue,            // longest value name 
        &cbMaxValueData,         // longest value data 
        &cbSecurityDescriptor,   // security descriptor 
        &ftLastWriteTime);       // last write time 

    // Enumerate the subkeys, until RegEnumKeyEx fails.

    if (cSubKeys)
    {
        for (i=0; i<cSubKeys; i++) 
        { 
            cbName = MAX_KEY_LENGTH;
            retCode = RegEnumKeyEx(hKey, i,
                achKey, 
                &cbName, 
                NULL, 
                NULL, 
                NULL, 
                &ftLastWriteTime); 
        }
    } 

    //Enumerate the key values. 

    if (cValues) 
    {
        for (i=0, retCode=ERROR_SUCCESS; i<cValues; i++) 
        { 
            cchValue = MAX_VALUE_NAME; 
            achValue[0] = '\0'; 
            retCode = RegEnumValue(hKey, i, 
                achValue, 
                &cchValue, 
                NULL, 
                NULL,
                NULL,
                NULL);

            if (retCode == ERROR_SUCCESS ) 
            { 
                DWORD dwSize = sizeof(lszValue);

                retCode = RegQueryValueEx(hKey, achValue, NULL, &dwType,(LPBYTE)&lszValue, &dwSize);

lszValue 是收到的数据。

Answer 1

我将用我的 Crystal 球来尝试回答这个问题。

复制执行得非常好，但您查看的数据是十六进制的而不是十进制的。十进制值10是十六进制的a，十进制11是b等等。