PowerShell script to open KSP at specified desktop offset

KSPLauncher.ps1

# PowerShell script to open KSP at specified desktop offset
# ---------------------------------------------------------
# cf. https://superuser.com/a/1324170/399048
#
# CKAN's Game command-line:
#   powershell -file .\KSPLauncher.ps1 -X 1921 -Y -350
#
[CmdletBinding()] Param (
  [int] $X = 0,
  [int] $Y = 0,
  [string] $KSPCmd = "KSP_x64.exe",
  [string] $KSPOpts = "-single-instance",
  [string] $KSPWorkdir = $pwd.ToString()
)

Begin {
  Try {
    [void][Window]
  } Catch {
    Add-Type @"
      using System;
      using System.Runtime.InteropServices;

      public struct RECT
      {
        public int Left;        // x position of upper-left corner
        public int Top;         // y position of upper-left corner
        public int Right;       // x position of lower-right corner
        public int Bottom;      // y position of lower-right corner
      }

      public class Window {
        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool GetWindowRect(
          IntPtr hWnd, out RECT lpRect);

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        public extern static bool MoveWindow( 
          IntPtr handle, int x, int y, int width, int height, bool redraw);

        [DllImport("user32.dll")] 
        [return: MarshalAs(UnmanagedType.Bool)]
        public static extern bool ShowWindow(
          IntPtr handle, int state);
      }
"@
  }
}
Process {
  Write-Verbose "Params `(X=$($X), Y=$($Y), KSPCmd='$($KSPCmd)', KSPOpts='$($KSPOpts)', KSPWorkdir='$($KSPWorkdir)'`)"

  $kspInstance = Start-Process -FilePath $KSPCmd -ArgumentList $KSPOpts -WorkingDirectory $KSPWorkdir -PassThru
  If ($kspInstance -eq $null) {
    Write-Error "'$($KSPCmd)' process not found"
    Return
  }

  If (-NOT ($PSBoundParameters.ContainsKey('X') -OR $PSBoundParameters.ContainsKey('Y'))) {
    Write-Verbose "nowhere to move"
    Return
  }

  While ($kspInstance.MainWindowHandle -eq [System.IntPtr]::Zero) {
    Start-Sleep -Milliseconds 100
  }
  Write-Verbose "Active $($kspInstance.ProcessName) `(Id=$($kspInstance.Id), Handle=$($kspInstance.MainWindowHandle)`)"

  $kspRect = New-Object RECT
  $ok = [Window]::GetWindowRect($kspInstance.MainWindowHandle, [ref] $kspRect)
  Write-Verbose "Rect `(Left=$($kspRect.Left), Top=$($kspRect.Top), Right=$($kspRect.Right), Bottom=$($kspRect.Bottom)`)"

  $W = $kspRect.Right - $kspRect.Left
  $H = $kspRect.Bottom - $kspRect.Top
  Write-Verbose "New Rect `(X=$($X), Y=$($Y), W='$($W)', H='$($H)'`)"
  If ($ok) {
    $ok = [Window]::MoveWindow($kspInstance.MainWindowHandle, $X, $Y, $W, $H, $true)
  }
  Write-Verbose "window moved"
}