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copied!<p>@<a href="https://stackoverflow.com/questions/29284/windows-vista-unable-to-load-dll-xdll-invalid-access-to-memory-location-dllnotf#29400">Martín</a></p> <p>The reason you were not getting the UAC prompt is because UAC can only change how a process is <strong>started</strong>, once the process is running it must stay at the same elevation level. The UAC will prompt will happen if:</p> <ul> <li>Vista thinks it's an installer (<a href="http://msdn.microsoft.com/en-us/library/aa905330.aspx#wvduac_topic3" rel="nofollow noreferrer">lots of rules here</a>, the simplest one is if it's called "setup.exe"), </li> <li>If it's flagged as "Run as Administrator" (you can edit this by changing the properties of the shortcut or the exe), or </li> <li>If the exe contains a manifest requesting admin privileges.</li> </ul> <p>The first two options are workarounds for 'legacy' applications that were around before UAC, the correct way to do it for new applications is to <a href="http://msdn.microsoft.com/en-us/library/bb756929.aspx" rel="nofollow noreferrer">embed a manifest resource</a> asking for the privileges that you need.</p> <p>Some program, such as <a href="http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx" rel="nofollow noreferrer">Process Explorer</a> appear to elevate a running process (when you choose "Show details for all process" in the file menu in this case) but what they really do is start a new instance, and it's that new instance that gets elevated - not the one that was originally running. This is the recommend way of doing it if only some parts of your application need elevation (e.g. a special 'admin options' dialog).</p>

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