Monitor setup for Sunshine/Moonlight streaming

Set-PrimaryMonitor.ps1

<#.SYNOPSIS
Set primary monitor resolution and scaling. Optionally move/maximize windows.
#>

Param(
    # Path to MultiMonitorTool.exe (https://www.nirsoft.net/utils/multi_monitor_tool.html)
    [Parameter(Mandatory)][string]$Tool,
    # Primary monitor width
    [int]$Width,
    # Primary monitor height
    [int]$Height,
    # Primary monitor DPI scaling
    [int]$Scale,
    # Move windows to the primary monitor
    [switch]$Move,
    # Maximize windows when moving them
    [switch]$Maximize
)

#? Set resolution and scale
$Name = 'Primary' #? Sunshine streams the primary monitor
if ($Width -or $Height) {
    if (!$Width) { $Width = $Height }
    if (!$Height) { $Height = $Width }
    & $Tool /SetMonitors "Name=$Name Width=$Width Height=$Height"
}
if ($Scale) { & $Tool /SetScale "Name=$Name $Scale" }

#? If not moving windows, we're done
if (!$Move) { return }
#? Move windows
if ($Width -or $Height -or $Scale) { Start-Sleep 3.0 }
& $Tool /MoveWindow 'Primary' 'All'

#? If not maximizing, we're done
if (!$Maximize) { return }
#? Define Win32 API function to maximize windows
Add-Type -MemberDefinition @'
[DllImport("user32.dll")]
public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
'@ -Name 'Win32ShowWindow' -Namespace 'User32'
#? Maximize windows using the Win32 API
$ShowWindowMaximized = 3
(Get-Process | Where-Object { $_.MainWindowTitle }).MainWindowHandle |
    ForEach-Object { [User32.Win32ShowWindow]::ShowWindow($_, $ShowWindowMaximized) } |
    Out-Null