Geisterbeleuchtung und Powershell

# hide powershell console window
Add-Type –MemberDefinition '[DllImport("user32.dll")]public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);' -name Window -namespace W32  
[void][W32.Window]::ShowWindow((Get-Process -id $pid).MainWindowHandle, 0) 

# get current brightness level
$startLevel = (Get-CimInstance -Namespace root\wmi -ClassName WMIMonitorBrightness).CurrentBrightness

# set new brightness level to 50%
(Get-WMIObject -Namespace root\WMI -Class WMiMonitorBrightnessMethods).WMISetBrightness(1,50)

# start app and wait until application is closed
start "notepad" -Wait  

# restore to old brightness
(Get-WMIObject -Namespace root\WMI -Class WMiMonitorBrightnessMethods).WMISetBrightness(1,$startLevel)

while (Get-Process -Name powerpnt){sleep 2}

# hide powershell console window
Add-Type –MemberDefinition '  
[DllImport("user32.dll")]public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);  
[DllImport("user32.dll")] public static extern bool SetForegroundWindow (IntPtr hWnd);  
' -name Window -namespace W32  
[void][W32.Window]::ShowWindow((Get-Process -id $pid).MainWindowHandle, 0) 

# get current brightness level
$startLevel = (gwmi -Namespace root\WMI -Class WMiMonitorBrightness).CurrentBrightness

# set new brightness level to 100%
(gwmi -Namespace root\WMI -Class WMiMonitorBrightnessMethods).WMISetBrightness(1,100)

# start app and run in PresenationMode
$ppt = "D:\Test.pptx"  
$app = New-Object -ComObject powerpoint.application
$pres = $app.Presentations.open($ppt)
$pres.SlideShowSettings.ShowType = 1
$ss = $pres.SlideShowSettings.Run()
# get process and set slideshow window to foreground
$ps = Get-Process -Name POWERPNT -EA SilentlyContinue
if ($ps.MainWindowHandle){
    [void][w32.window]::SetForegroundWindow($ps.MainWindowHandle)
}
# wait until slideshow finished
while ($pres.SlideShowWindow){sleep 1}
# close pp process
$ps | stop-process
# release com ressources
[void][System.Runtime.InteropServices.Marshal]::ReleaseComObject($app)

# restore to old brightness
(gwmi -Namespace root\WMI -Class WMiMonitorBrightnessMethods).WMISetBrightness(1,$startLevel)

$pres.SlideShowSettings.ShowType = 1