Change Desktop Background color Remotely

Question

Hi , I will change Desktop background color on remote computer , I have script , to change color immediately on local machine , when aj run this script Remotely No effect, can help?

$ComputerName = "PC170774"  
  
Invoke-Command -ComputerName $ComputerName -ScriptBlock {   
param(  
[Parameter(Position=0)]  
$R=0,  
[Parameter(Position=1)]  
$G=0,  
[Parameter(Position=2)]  
$B=0  
)  
  
$code = @'   
 using System;   
 using System.Drawing;   
 using System.Runtime.InteropServices;   
 using Microsoft.Win32;   
    
    
 namespace CurrentUser   
 {   
     public class Desktop   
     {   
         [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]   
         private static extern int SystemParametersInfo(int uAction, int uParm, string lpvParam, int fuWinIni);   
         [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]   
         private static extern int SetSysColors(int cElements, int[] lpaElements, int[] lpRgbValues);   
         public const int UpdateIniFile = 0x01;   
         public const int SendWinIniChange = 0x02;   
         public const int SetDesktopBackground = 0x0014;   
         public const int COLOR_DESKTOP = 1;   
         public int[] first = {COLOR_DESKTOP};   
    
    
         public static void RemoveWallPaper()   
         {   
             SystemParametersInfo( SetDesktopBackground, 0, "", SendWinIniChange | UpdateIniFile );   
             RegistryKey regkey = Registry.CurrentUser.OpenSubKey("Control Panel\\Desktop", true);   
             regkey.SetValue(@"WallPaper", 0);   
             regkey.Close();   
         }   
    
         public static void SetBackground(byte r, byte g, byte b)   
         {   
             int[] elements = {COLOR_DESKTOP};   
    
             RemoveWallPaper();   
             System.Drawing.Color color = System.Drawing.Color.FromArgb(r,g,b);   
             int[] colors = { System.Drawing.ColorTranslator.ToWin32(color) };   
    
             SetSysColors(elements.Length, elements, colors);   
             RegistryKey key = Registry.CurrentUser.OpenSubKey("Control Panel\\Colors", true);   
             key.SetValue(@"Background", string.Format("{0} {1} {2}", color.R, color.G, color.B));   
             key.Close();   
         }   
     }   
 }   
    
'@  
try  
{  
    Add-Type -TypeDefinition $code -ReferencedAssemblies System.Drawing.dll   
}catch{  
    # An error is thrown if the type [CurrentUser.Desktop] is already created  
    # so we ignore it.  
}  
finally  
{  
    [CurrentUser.Desktop]::SetBackground($R, $G, $B)  
}  
  
}  

++++++++++++++++++++++++
a try copy this script in 1.ps1 file to remote computer and run :

$RemoteScriptPath = "C:\ps1"  
Invoke-Command -ComputerName $Computername -ScriptBlock { Start-Process powershell.exe -ArgumentList $using:RemoteScriptPath -Wait }  

++++++++++++++++++++++++++

with No effect,,,

Can change Background color on remote machine to see effect immediately(no need logoff or restart)?

Answer 1

Could it be the remote script is running interactive without a "current user context/profile"?

This would explain, why the script is working if started locally in a user context and not working if invoked remote.

---

(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

Regards
Andreas Baumgarten

Answer 2

Hi，

Have you tried to login to the remote server and run the script? Please also see if this works.

Invoke-Command -FilePath $ScriptPath  -ComputerName $Computername  

Best Regards，
Ian

============================================

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Answer 3

Yes I try it, no effect ,

when run script localy works fine, BG change immediately.

Answer 4

Did you find a solution?
I have the same issue (almost).
I am using a java agent to trigger the powershell script call remotely.
I does not fail but does not produce the expected result either.
The same exact script work perfectly when ran from within the target machine manually.