Change desktop background in C#

Question

I try to change the background using C#.Example:

[DllImport("user32.dll", CharSet = CharSet.Auto)]
    private static extern Int32 SystemParametersInfo(UInt32 uiAction, UInt32
    uiParam, String pvParam, UInt32 fWinIni);
    private static UInt32 SPI_SETDESKWALLPAPER = 20;
    private static UInt32 SPIF_UPDATEINIFILE = 0x1;

And then

  SystemParametersInfo(SPI_SETDESKWALLPAPER, 1, @"C:\background.bmp", SPIF_UPDATEINIFILE);
                            }

But it doesn't work...Help?

possible duplicate of [Change desktop wallpaper using code in .NET](http://stackoverflow.com/questions/1061678/change-desktop-wallpaper-using-code-in-net) — DeshDeep Singh, Jul 22 '15 at 11:49
well it's actually scottgames.com/4.jpg but in my main program I use a .bmp file. Sorry — Ender Graphix, Jul 22 '15 at 11:50
so what, you downloaded the image and changed it to bmp? I mean show us the code that you actually use. — W van Rij, Jul 22 '15 at 11:51
Well it's the address of a private website.It's just an address pointing to a .bmp image, that's all. — Ender Graphix, Jul 22 '15 at 11:52

EZI · Accepted Answer · 2015-07-22T12:09:37.430

2

pvParam should be a local file. It will not work for urls...

First download the image, then give its local path to SystemParametersInfo method.

var filename = "4.jpg";
new WebClient().DownloadFile("http://www.scottgames.com/4.jpg", filename);
SystemParametersInfo(SPI_SETDESKWALLPAPER, 1, filename, SPIF_UPDATEINIFILE);

edited Jul 22 '15 at 12:09

answered Jul 22 '15 at 11:59

EZI

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Doesn't this only work with .bmp images?It also works with JPEG images? – Ender Graphix Jul 22 '15 at 12:23
I tried it before posting. Yes it works also for jpg images – EZI Jul 22 '15 at 12:25

Change desktop background in C#

1 Answers1