How to read from Windows 10 registry?

[Tomi]

Hi,

OS: Windows 10 64-bit
application, which I wrote: 64 bit for Windows

I have a key in registry:
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\companyName\applicationName

How can I read from it?

When I try:

    QSettings settings(QSettings::Scope::SystemScope, "companyName", "applicationName");

    qDebug()<<settings.fileName();

I get:

"\\HKEY_LOCAL_MACHINE\\Software\\companyName\\applicationName"

I don't see WOW6432Node

On docs I see only:

Note: On Windows, for 32-bit programs running in WOW64 mode, settings are stored in the following registry path: HKEY_LOCAL_MACHINE\Software\WOW6432node. 

[Cobra91151]

@Tomi

Hello!

You need to use QSettings a bit differently. Please check out my test code below and the docs for QVariant QSettings::value method (https://doc.qt.io/qt-5/qsettings.html#value)

Code:

QSettings *testSettings = new QSettings("HKEY_LOCAL_MACHINE\\SOFTWARE\WOW6432Node\\companyName\\applicationName", QSettings::NativeFormat, this);
QVariant testVariant = testSettings->value(const QString &key, const QVariant &defaultValue = QVariant());
testSettings->deleteLater();

If you still have issue, feel free to reply. Happy coding!

[JonB]

@Tomi
The first question is why do you want to access WOW6432Node from a 64-bit program?

[Tomi]

@JonB

Because I have Inno Setup, which add key to this location

[Cobra91151]

@Tomi

Hello!

You need to use QSettings a bit differently. Please check out my test code below and the docs for QVariant QSettings::value method (https://doc.qt.io/qt-5/qsettings.html#value)

Code:

QSettings *testSettings = new QSettings("HKEY_LOCAL_MACHINE\\SOFTWARE\WOW6432Node\\companyName\\applicationName", QSettings::NativeFormat, this);
QVariant testVariant = testSettings->value(const QString &key, const QVariant &defaultValue = QVariant());
testSettings->deleteLater();

If you still have issue, feel free to reply. Happy coding!