make a fake smartscreen/update-like popup

FakeScreen.ps1

$Title = "Windows needs your help"
$Content = @"
All we need is your credit card number, the three digits on the back, and the expiration month and day! But be quick!

Sphinx of black quartz, judge my brown fox over this lazy dog!
Testing testing testing
"@
$ButtonText = "Accept"

# -- code begins below, scroll down till you see "ACCEPT CODE" to edit what happens when you accept

Add-Type -AssemblyName PresentationCore
Add-Type -AssemblyName WindowsBase

$AccentColor = (new-object System.Windows.Media.BrushConverter).ConvertFromString('#FF'+(([Convert]::ToString((Get-ItemProperty -Path HKCU:\Software\Microsoft\Windows\DWM).AccentColor,16).Substring(2)-split '(..)'|? { $_ })[2..0])-join '' -split ' ' -join '')

$Dimmer = New-Object system.windows.window
$Dimmer.AllowsTransparency = $true
$Dimmer.WindowStyle = "None"
$Dimmer.WindowStartupLocation = "CenterScreen"
$Dimmer.ResizeMode = "NoResize"
$Dimmer.WindowState = "Maximized"
$Dimmer.Opacity = 0.5
$Dimmer.Background = [System.Windows.Media.Brushes]::Black

$Window = New-Object system.windows.window
$Window.Background = $AccentColor
$Window.Foreground = [System.Windows.Media.Brushes]::White
$Window.WindowStyle = "None"
$Window.WindowStartupLocation = "CenterScreen"
$Window.ResizeMode = "NoResize"
$Window.SizeToContent = "WidthAndHeight"
$Window.MinHeight = 400

$Grid = New-Object System.Windows.Controls.Grid
$Grid.VerticalAlignment=0
$Row1 = new-object system.windows.controls.rowdefinition
$Row2 = new-object system.windows.controls.rowdefinition
$Row3 = new-object system.windows.controls.rowdefinition
$Grid.RowDefinitions.add($Row1)
$Grid.RowDefinitions.add($Row2)
$Grid.RowDefinitions.add($Row3)
$Grid.Margin = 16
$TitleLabel = New-Object System.Windows.Controls.Label
$TitleLabel.Content = $Title
$TitleLabel.FontFamily = "Segoe UI"
$TitleLabel.FontSize = 42
$TitleLabel.Foreground = [System.Windows.Media.Brushes]::White

$ContentText = New-Object System.Windows.Controls.AccessText
$ContentText.TextWrapping = "WrapWithOverflow"
$ContentText.Text = $Content

$ContentLabel = New-Object System.Windows.Controls.Label
$ContentLabel.Content = $ContentText
$ContentLabel.FontFamily = "Segoe UI"
$ContentLabel.FontSize = 18
$ContentLabel.Foreground = [System.Windows.Media.Brushes]::White
$ContentLabel.MaxWidth = 800
$ContentMargin = New-object System.Windows.Thickness
$ContentMargin.Top = 13 
$ContentLabel.Margin = $ContentMargin
[system.windows.controls.grid]::SetRow($ContentLabel,1)

$Button = New-Object System.Windows.Controls.Button
$Button.Content = $ButtonText
$Button.FontSize = 18
$Button.FontFamily = "Segoe UI"
$ButtonPadding = New-object System.Windows.Thickness
$ButtonPadding.Top = $ButtonPadding.Bottom = 3
$ButtonPadding.Right = $ButtonPadding.Left = 20
$Button.Padding = $ButtonPadding
$Button.BorderThickness = 2
$Button.BorderBrush = [System.Windows.Media.Brushes]::White 
$Button.Foreground = [System.Windows.Media.Brushes]::White
$Button.Background = [System.Windows.Media.Brushes]::Transparent
$Button.HorizontalAlignment = "Right"
[system.windows.controls.grid]::SetRow($Button,2)
$Button.Add_Click({Start-Sleep -m 120;$Dimmer.Close();$Window.Close();

#-- EXAMPLE ACCEPT CODE --
Start-Sleep -m 650;Start-Process "https://twitter.com/intent/tweet?text=@NO_BOOT_DEVICE%20Here%27s%20my%20credit%20card%20info%21%3A%0a"
#-- END EXAMPLE ACCEPT CODE --

})

$Grid.Children.add($TitleLabel)
$Grid.Children.add($ContentLabel)

$ButtonMargin = New-object System.Windows.Thickness
$ButtonMargin.Top = (400- 221) #TODO this should be $window.actualheight - $grid.actualheight but that returns NaN at this point fsr
$Button.Margin = $ButtonMargin

$Grid.Children.add($Button)
$Window.Content = $Grid
$Dimmer.Show();$Window.ShowDialog()