Unix change desktop background seamlessly

'Steps you will do.
'Start visual studio 2005 and create a new window project. 
'Set the following properties of the form


'Text = "Set Wallpaper"
'Size = “1024,750”
'Now drip a picture box control on the form and set its following properties.


'Size = “1024,725”
'Sizemode = ”centerimage”
'Drop a two button controls on the form and set its following properties as below.


'First button control.

'Name = " btgetimage"
'Text = " Brows For Image"

'Second button control.

'Name = " btsetwallpaper"
'Text = " Set Wallpaper"

'Now drop an openfiledialog control on the form. 
'Open you code window and import the following namespace.


Imports System.IO.Directory


'Now declare the function and variables as below which will use win API's to set the wallpaper.


Private Const SPI_SETDESKWALLPAPER As Integer = &H14

Private Const SPIF_UPDATEINIFILE As Integer = &H1

Private Const SPIF_SENDWININICHANGE As Integer = &H2

Private Declare Auto Function SystemParametersInfo Lib "user32.dll" (ByVal uAction As Integer, ByVal uParam As Integer, ByVal lpvParam As String, ByVal fuWinIni As Integer) As Integer

Const WallpaperFile As String = "c:\wallpaper.bmp"


'Make a function as below.


Friend Sub SetWallpaper(ByVal img As Image)

Dim imageLocation As String

imageLocation = My.Computer.FileSystem.CombinePath(My.Computer.FileSystem.SpecialDirectories.MyPictures, WallpaperFile)

Try

img.Save(imageLocation, System.Drawing.Imaging.ImageFormat.Bmp)

SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, imageLocation, SPIF_UPDATEINIFILE Or SPIF_SENDWININICHANGE)

Catch Ex As Exception

MsgBox("There was an error setting the wallpaper: " & Ex.Message)

End Try

End Sub

'Now in the click event of the first button write the following code to open and get the image.

OpenFileDialog1.InitialDirectory = "c:\"

OpenFileDialog1.Filter = "JPG|*.jpg|Bitmap|*.bmp"

Dim dialogresult As DialogResult = OpenFileDialog1.ShowDialog

If dialogresult = Windows.Forms.DialogResult.OK Then

PictureBox1.ImageLocation = OpenFileDialog1.FileName

btsetwallpaper.Enabled = True

End If


'In the click event of the second button write following code to set the wallpaper.


SetWallpaper(Me.PictureBox1.Image)

MessageBox.Show("Wallpaper has been changed", "Set Wallpaper", MessageBoxButtons.OK, MessageBoxIcon.Information)

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