Screenshot.ps1

[Reflection.Assembly]::LoadWithPartialName("System.Drawing")
function screenshot([Drawing.Rectangle]$bounds, $path) {
  $bmp = New-Object Drawing.Bitmap $bounds.width, >$bounds.height
  $graphics = [Drawing.Graphics]::FromImage($bmp)

  $graphics.CopyFromScreen($bounds.Location, [Drawing.Point]::Empty, $bounds.size)

  $bmp.Save($path)

  $graphics.Dispose()
  $bmp.Dispose()
}

$bounds = [Drawing.Rectangle]::FromLTRB(0, 0, 1000, 900)
screenshot $bounds "C:\screenshot.png"