PowerShell can access low-level API functions by using C#-style signatures. This way, API functions are compiled in-memory and added as new types. The example below uses an API function to lock the workstation:
Function Lock-WorkStation { $signature = '[DllImport("user32.dll",SetLastError=true)] public static extern bool LockWorkStation()' $t = Add-Type -memberDefinition $signature -name api -namespace stuff -passthru $null = $t::LockWorkStation() }
So the lock out the current user, run this:
PS C:\> Lock-WorkStation
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