为什么我对C ++中的注册表的更改仍然存在?

时间:2009-05-14 16:31:27

标签: c++ windows registry

我正在尝试使用C ++编辑注册表,这是我第一次尝试这样做,而且我失败了。我没有收到任何错误代码,一切都说成功完成,但实际上并没有改变注册表项。

以下是我正在使用的代码:

HKEY hkey;
DWORD dwDisposition, dwType, dwSize;
int autorun = 0x00;
int CD_AUTORUN_DISABLED = 0x20;
long errorCode;
errorCode = RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\Explorer"), 0, KEY_ALL_ACCESS, &hkey);

if(errorCode == ERROR_SUCCESS) {
        dwType = REG_DWORD;
        dwSize = sizeof(dwType);
        errorCode = RegQueryValueEx(hkey, TEXT("NoDriveTypeAutoRun"), NULL, &dwType, 
(PBYTE)&autorun, &dwSize);

cout << "Autorun value: " << autorun << endl;
if((autorun & CD_AUTORUN_DISABLED) == 0x20){
        int newAutorun = (autorun - CD_AUTORUN_DISABLED);
        cout << "New value: " << newAutorun  << endl;
        errorCode = RegSetValueEx(hkey, TEXT("NoDriveTypeAutoRun"), 0, dwType, (PBYTE) &autorun, dwSize);
        if(errorCode == ERROR_SUCCESS){
            errorCode = RegCloseKey(hkey);              
            if(errorCode == ERROR_SUCCESS){
                cout << "Value changed." << endl;
            }
        }else{
            cout << "Value change failed, error code: " << errorCode << endl;
        }
    }else{
        cout << "Keep current value." << endl;
    }

}else{
    if(errorCode == ERROR_ACCESS_DENIED){
        cout << "Access denied." << endl;
    }else{
        cout << "Error! " << errorCode << " : " << ERROR_SUCCESS << endl;
    }
}

我做错了什么?

3 个答案:

答案 0 :(得分:2)

您似乎将注册表项设置为您读取的相同值。

int newAutorun = (autorun - CD_AUTORUN_DISABLED);
                cout << "New value: " << newAutorun  << endl;
                errorCode = RegSetValueEx(hkey, TEXT("NoDriveTypeAutoRun"), 0, dwType, (PBYTE) **&autorun**, dwSize);

应该是

int newAutorun = (autorun - CD_AUTORUN_DISABLED);
                cout << "New value: " << newAutorun  << endl;
                errorCode = RegSetValueEx(hkey, TEXT("NoDriveTypeAutoRun"), 0, dwType, (PBYTE) &newAutorun, dwSize);

答案 1 :(得分:0)

我想这个:

errorCode = RegSetValueEx(hkey, TEXT("NoDriveTypeAutoRun"), 0, dwType, (PBYTE) &autorun, dwSize);

应该是这样的:

errorCode = RegSetValueEx(hkey, TEXT("NoDriveTypeAutoRun"), 0, dwType, (PBYTE) &newAutorun, dwSize);

(仔细看第2到最后一个参数)

答案 2 :(得分:0)

尝试更改此内容:

errorCode = RegSetValueEx(hkey,TEXT(“NoDriveTypeAutoRun”),0,dwType,(PBYTE)&amp; autorun,dwSize);

到此:

errorCode = RegSetValueEx(hkey,TEXT(“NoDriveTypeAutoRun”),0,dwType,(PBYTE)&amp; newAutorun,dwSize);