Setting desktop background color

This is a discussion on Setting desktop background color within the Windows Programming forums, part of the Platform Specific Boards category; How can I get at the desktop background settings programatically? Are they stored as a registry entry?...

  1. #1
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    Setting desktop background color

    How can I get at the desktop background settings programatically? Are they stored as a registry entry?

  2. #2
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    What sort of background?

    If it's just the wallpaper you want to change, and Active Desktop is disabled, then:-
    Code:
    HKEY hKey;
    
    RegOpenKeyEx(HKEY_CURRENT_USER, "Control Panel\\Desktop", 0, KEY_SET_VALUE, &hKey);
    RegSetValueEx(hKey, "Wallpaper", 0, REG_SZ, "Image.bmp", 10);
    RegCloseKey(hKey);
    SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, NULL, SPIF_SENDCHANGE);
    Otherwise I dunno how to change the Active Desktop settings.

  3. #3
    carry on JaWiB's Avatar
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    Never tried this myself, but a search on MSDN turned this up.
    "Think not but that I know these things; or think
    I know them not: not therefore am I short
    Of knowing what I ought."
    -John Milton, Paradise Regained (1671)

    "Work hard and it might happen."
    -XSquared

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    I'll give a brief example but I think this is going to be more informative and include more detail: Set Desktop Color In short:
    Code:
        int aiElements[1] = {COLOR_BACKGROUND};
        DWORD aColors[1] = {RGB(0, 255, 0)}; //Green
        SetSysColors(1, aiElements, aColors);
    Regards,
    Brian

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    Wow, another Brian (bmf is a Brian too amongst others, this should be called brianprogramming.com). Thanks Brian.

  6. #6
    BMJ
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    Quote Originally Posted by Brian
    Wow, another Brian (bmf is a Brian too amongst others, this should be called brianprogramming.com). Thanks Brian.
    Don't forget me!

  7. #7
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    Hello,
    I need to change the desktop background programming.

    The execution of the below .vbs doesn't do anything. What is wrong? Thank you


    Code:
    dim wshShell
    dim sUserName
    
    Set wshShell = WScript.CreateObject("WScript.Shell")
    sUserName = wshShell.ExpandEnvironmentStrings("%USERNAME%")
    
    Set oShell = CreateObject("WScript.Shell")
    Set oFSO = CreateObject("Scripting.FileSystemObject")
    
    sWinDir = oFSO.GetSpecialFolder(0)
    sWallPaper = "C:\Documents and Settings\Simpatico\My Documents\Woerter Speichern Files\lastvocab.png"
    
    ' update in registry
    oShell.RegWrite "HKCU\Control Panel\Desktop\Wallpaper", sWallPaper
    
    ' let the system know about the change
    oShell.Run "%windir%\System32\RUNDLL32.EXE user32.dll,UpdatePerUserSystemParameters", 1, True

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    any help on this?

  9. #9
    not-a-geek
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    If you only want to change the wallpaper then there is absolutely no need to go through the registry for it.

    Code:
    SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, filename, SPIF_UPDATEINIFILE);
    Just specify a filename instead of NULL as third parameter. Windows versions prior to Vista will only accept .BMP files, so you'll have to convert them first unless you programm only needs to run on vista/7.

  10. #10
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    I need a complete script example.

    I've found this on microsoft's website, but nothing happens when I execute the script and log out.
    (I've placed the file also in the system32 folder, let alone changing the path.

    Code:
    Const HKEY_CURRENT_USER = &H80000001
    
    strComputer = "."
    
    Set objReg = GetObject("winmgmts:\\" & strComputer & "\root\default:StdRegProv")
    
    intLowNumber = 1
    intHighNumber = 6
    
    Randomize
    
    intNumber = Int((intHighNumber - intLowNumber + 1) * Rnd + intLowNumber)
    
    Select Case intNumber
        Case 1
            strValue = "C:\WINDOWS\System32\Wallpaper1.bmp"
        Case 2
            strValue = "C:\WINDOWS\System32\Wallpaper2.bmp"
        Case 3
            strValue = "C:\WINDOWS\System32\Wallpaper3.bmp"
        Case 4
            strValue = "C:\WINDOWS\System32\Wallpaper4.bmp"
        Case 5
            strValue = "C:\WINDOWS\System32\Wallpaper5.bmp"
        Case 6
            strValue = "C:\WINDOWS\System32\Wallpaper6.bmp"
    End Select
    
    strKeyPath = "Control Panel\Desktop"
    ValueName = "Wallpaper"
    
    objReg.SetStringValue HKEY_USERS, strKeyPath, ValueName, strValue

  11. #11
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    Quote Originally Posted by Nyda View Post
    Windows versions prior to Vista will only accept .BMP files, so you'll have to convert them first unless you programm only needs to run on vista/7.
    You can set JPG, GIF or any format for wallpaper on XP, but with COM

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