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C++ to do a Screen Capture of "Secured Desktop" (UAC Prompts)
Posted on 2013-05-21
Is there anyone who know how to take screen capture of the secured desktop? (The darker overlay where UAC Prompt appears)
The regular "bitblt" that i'm using doesn't seems to capture these screens.
Thanks
The regular "bitblt" that i'm using doesn't seems to capture these screens.
Thanks
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5 Comments
The whole idea behind the UAC prompt is that Windows limits what processes can run so that malicious software cannot capture your keyboard input (password?), or click the install button for you, or slip by unnoticed.
Your applications are not supposed to be able to interact with the secured desktop at all.
Why do you need to get a screen capture of that desktop? Perhaps we can help you find a different method to achieve the same end result.
Your applications are not supposed to be able to interact with the secured desktop at all.
Why do you need to get a screen capture of that desktop? Perhaps we can help you find a different method to achieve the same end result.
I know the whole idea about the UAC, but i know it's possible to do it (TeamViewer for example do it).
We are developping a solution similar to TeamViewer/VNC/LogMeIn/etc
The point is that if the local user think that his support staff see the prompt, and wait for an action from him... they will wait forever.
I've seen registries like PromptOnSecureDesktop, but from the tests i've done, it has no impact on the result with bitblt. But maybe i've done something wrong, just setting it to 0 or false might not be enough...
We are developping a solution similar to TeamViewer/VNC/LogMeIn/etc
The point is that if the local user think that his support staff see the prompt, and wait for an action from him... they will wait forever.
I've seen registries like PromptOnSecureDesktop, but from the tests i've done, it has no impact on the result with bitblt. But maybe i've done something wrong, just setting it to 0 or false might not be enough...
Active today
To handle UAC, we need proper privilege. So you can take a look into
ImpersonateLoggedOnUser()
ImpersonateLoggedOnUser()
I'll do some reading about this API call and i'll get back later after some tests. Thanks for this hint Subrat2009
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