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POP/Invoke during PSSession
 

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    <p>For some reason, P/Invoke via PSSession is not working. I have a client side script which I run from a server through a PSSession. Here's the code for the client-side script:</p> <pre><code>$signature = @" [DllImport("user32.dll")] public static extern bool BlockInput(bool fBlockIt); "@ $block = Add-Type -MemberDefinition $signature -Name DisableInput -Namespace DisableInput -PassThru $unblock = Add-Type -MemberDefinition $signature -Name EnableInput -Namespace EnableInput -PassThru $block::BlockInput($true) Start-Sleep -Seconds 10 $unblock::BlockInput($false) </code></pre> <p>I'm basically testing blocking/unblocking keyboard and mouse access, based off a walkthrough I found <a href="https://www.google.com/url?sa=t&amp;rct=j&amp;q=&amp;esrc=s&amp;source=web&amp;cd=1&amp;cad=rja&amp;ved=0CCsQFjAA&amp;url=http://www.powershell.nu/2012/10/08/block-and-unblock-keyboard-mouse-input-using-powershell/&amp;ei=KvyfUp3XIZHsoATFvoDIBw&amp;usg=AFQjCNGB7APD7y-Cro0DCJK-HoKFUpTvgQ&amp;bvm=bv.57155469,d.cGU" rel="nofollow">here</a>. I can successfully get the script to run, and the account I'm running it with should have elevated permissions, but for some reason, the call to <code>$block::BlockInput</code> and <code>$unblock::BlockInput</code> are both returning <code>False</code>, and neither the keyboard nor the mouse are blocked.</p> <p>When I run the exact same script with the same account directly on the client machine, the script does exactly what it should - locks the keyboard and mouse for 10 seconds, and both calls to <code>BlockInput</code> return <code>True</code>. What am I doing wrong? Is it possible to P/Invoke via a PSSession?</p>
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    1. COHave you eliminated any possible permission issues as the cause? I've always faced some difficulty with running Powershell scripts on remote machine; although I admit I've never used PSSession.
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