CODEWITHSUNDEEP
winformspowershellwinapiscreen-resolution
tjwrona
tjwrona

Reputation: 9025

PowerShell script returning the wrong screen resolution

I just wrote a simple PowerShell script to get the screen resolution of my monitor, but it seems to be returning the wrong values.

# Returns an screen width and screen height of maximum screen resolution
function Get-ScreenSize {
    $screen = [System.Windows.Forms.Screen]::PrimaryScreen
    $width  = $screen.Bounds.Width
    $height = $screen.Bounds.Height
    return $width, $height
}

Get-ScreenSize

I am running this script on a 4k monitor with the resolution set at 3840 x 2160, but it is giving me the following output:

1536

864

Is there anything that would cause System.Windows.Forms.Screen to get the wrong "Bounds" values?

Upvotes: 4

Views: 4019

Answers (3)

Julian Chow
Julian Chow

Reputation: 76

It's because that command gives you the scaled resolution. If you're running 3840 x 2160 but you're not running on 100% scaling you'll get a different value.

Upvotes: 1

tjwrona
tjwrona

Reputation: 9025

Well I didn't exactly find out why I was getting such strange results... but I did find another approach that actually seems simpler and appears to be accurate.

$vc = Get-WmiObject -class "Win32_VideoController"
$vc.CurrentHorizontalResolution
$vc.CurrentVerticalResolution

This will print the current screen resolution and appears to be giving me accurate results which is what I was actually looking for. If anyone figures out what could cause the other approach to produce inaccurate results I would still really like to know why it is happening though...

Upvotes: 6

M.M.
M.M.

Reputation: 151

That's odd.

Why on earth has Microsoft only provided the Get-DisplayResolution cmdlet with Server Core?

That edition ships without a Start-button... and according to the comment above on the returned display size (minus start-bar); I won't be surprised to hear that cmdlet is using the same .NET code library.

Quick search in my HKLM\SYSTEM\CurrentControlSet\Control lists a few keys for monitors and values per screen, but nothing useful.

Edit: see Q7967699.

PS D:\Scripts> Add-Type -AssemblyName System.Windows.Forms

PS D:\Scripts> [System.Windows.Forms.Screen]::AllScreens


BitsPerPixel : 32
Bounds       : {X=0,Y=0,Width=3840,Height=2160}
DeviceName   : \\.\DISPLAY1
Primary      : True
WorkingArea  : {X=0,Y=0,Width=3840,Height=2120}

Upvotes: -2

Related Questions