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Editorial Team
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Asked: 2026-05-22T14:44:49+00:00

I have a C++ application, In which we write settings to the registry (Under

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I have a C++ application, In which we write settings to the registry (Under HKEY_CURRENT_USER & HKEY_LOCAL_MACHINE for my application).When windows User Access Control is set to Always Notify, RegCreateKeyEx method returns access denied and it does not write to HKEY_LOCAL_MACHINE but it writes successfully in HKEY_CURRENT_USER registry.
I am using this method to write:

lRet = RegCreateKeyEx( m_hSWRootKey, LPCTSTR(strKey), 
0, _T(""), m_dwCreationFlag, KEY_WRITE | KEY_READ, 
NULL, &hKey, &Disposition );

This method works fine when UAC is set to Never Notify.

What is the reason that it does not write to HKEY_LOCAL_MACHINE?
How can i override the windows UAC setting so i will be able to write when it is set to Always Notify?

Please suggest.

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1 Answer

  1. Editorial Team

    If you do take the path to only allow the application to be run as admin, you can set the manifest in Visual Studio in:

    Project >> Properties >> Configuration Properties >> Linker >> Manifest File >> UAC Execution Level.

    Ideally you would find some way that does not require modifying HKEY_LOCAL_MACHINE

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