ChangeScreenResolution

1.0

ChangeScreenResolution.ps1

<#
  .Synopsis
    Sets the Screen Resolution of the primary monitor
  .Description
    Uses Pinvoke and ChangeDisplaySettings Win32API to make the change
  .Example
    Set-ScreenResolution -Width 1024 -Height 768
  #>
function Set-ScreenResolution(){
param (
[Parameter(Mandatory=$true,
      Position = 0)]
[int]
$Width,
[Parameter(Mandatory=$true,
      Position = 1)]
[int]
$Height
)
$pinvokeCode = @"
using System;
using System.Runtime.InteropServices;
namespace Resolution
{
  [StructLayout(LayoutKind.Sequential)]
  public struct DEVMODE1
  {
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string dmDeviceName;
    public short dmSpecVersion;
    public short dmDriverVersion;
    public short dmSize;
    public short dmDriverExtra;
    public int dmFields;
    public short dmOrientation;
    public short dmPaperSize;
    public short dmPaperLength;
    public short dmPaperWidth;
    public short dmScale;
    public short dmCopies;
    public short dmDefaultSource;
    public short dmPrintQuality;
    public short dmColor;
    public short dmDuplex;
    public short dmYResolution;
    public short dmTTOption;
    public short dmCollate;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
    public string dmFormName;
    public short dmLogPixels;
    public short dmBitsPerPel;
    public int dmPelsWidth;
    public int dmPelsHeight;
    public int dmDisplayFlags;
    public int dmDisplayFrequency;
    public int dmICMMethod;
    public int dmICMIntent;
    public int dmMediaType;
    public int dmDitherType;
    public int dmReserved1;
    public int dmReserved2;
    public int dmPanningWidth;
    public int dmPanningHeight;
  };
 
  class User_32
  {
    [DllImport("user32.dll")]
    public static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE1 devMode);
    [DllImport("user32.dll")]
    public static extern int ChangeDisplaySettings(ref DEVMODE1 devMode, int flags);
    public const int ENUM_CURRENT_SETTINGS = -1;
    public const int CDS_UPDATEREGISTRY = 0x01;
    public const int CDS_TEST = 0x02;
    public const int DISP_CHANGE_SUCCESSFUL = 0;
    public const int DISP_CHANGE_RESTART = 1;
    public const int DISP_CHANGE_FAILED = -1;
  }
 
  public class PrmaryScreenResolution
  {
    static public string ChangeResolution(int width, int height)
    {
      DEVMODE1 dm = GetDevMode1();
      if (0 != User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm))
      {
        dm.dmPelsWidth = width;
        dm.dmPelsHeight = height;
        int iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_TEST);
        if (iRet == User_32.DISP_CHANGE_FAILED)
        {
          return "Unable To Process Your Request. Sorry For This Inconvenience.";
        }
        else
        {
          iRet = User_32.ChangeDisplaySettings(ref dm, User_32.CDS_UPDATEREGISTRY);
          switch (iRet)
          {
            case User_32.DISP_CHANGE_SUCCESSFUL:
              {
                return "Success";
              }
            case User_32.DISP_CHANGE_RESTART:
              {
                return "You Need To Reboot For The Change To Happen.\n If You Feel Any Problem After Rebooting Your Machine\nThen Try To Change Resolution In Safe Mode.";
              }
            default:
              {
                return "Failed To Change The Resolution";
              }
          }
        }
 
      }
      else
      {
        return "Failed To Change The Resolution.";
      }
    }
    private static DEVMODE1 GetDevMode1()
    {
      DEVMODE1 dm = new DEVMODE1();
      dm.dmDeviceName = new String(new char[32]);
      dm.dmFormName = new String(new char[32]);
      dm.dmSize = (short)Marshal.SizeOf(dm);
      return dm;
    }
  }
}
"@
Add-Type $pinvokeCode -ErrorAction SilentlyContinue
[Resolution.PrmaryScreenResolution]::ChangeResolution($width,$height)
}