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Imports System.IO Namespace Tools Public Class Wallpaper Const SPI_SETDESKWALLPAPER As Integer = 20 Const SPIF_UPDATEINIFILE As Integer = &H1 Const SPIF_SENDWININICHANGE As Integer = &H2 Private Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Integer, ByVal uParam As Integer, ByVal lpvParam As String, ByVal fuWinIni As Integer) As Integer Private _RegKey As Microsoft.Win32.RegistryKey Private _PictureBmp As String Private _imgPicture As Image Public Shared Enum WallpaperStyle Centered = 0 Tiled = 1 Stretched = 2 End Enum Public Function Shared Change(ByVal PicturePath As String, Optional ByVal wpStyle As WallpaperStyle = WallpaperStyle.Centered) As Boolean If PicturePath Is Nothing Then Return False ' No picture specfied If PicturePath = "" Then SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, PicturePath, SPIF_UPDATEINIFILE Or SPIF_SENDWININICHANGE) Return True End If If File.Exists(PicturePath) Then ' Does the file actually exist? Try ' This class doesn't use my registry class so it can remain independant. _RegKey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("Control Panel\Desktop", True) Select Case wpStyle Case WallpaperStyle.Centered _RegKey.SetValue("TileWallpaper", "0") _RegKey.SetValue("WallpaperStyle", "0") Case WallpaperStyle.Tiled _RegKey.SetValue("TileWallpaper", "1") _RegKey.SetValue("WallpaperStyle", "0") Case WallpaperStyle.Stretched _RegKey.SetValue("TileWallpaper", "0") _RegKey.SetValue("WallpaperStyle", "2") End Select _RegKey.Flush() _RegKey.Close() ' If picture not a bitmap then convert it first. Dim fi As New FileInfo(PicturePath) If fi.Extension.ToLower <> ".bmp" Then _imgPicture = Image.FromFile(PicturePath, True) _PictureBmp = PicturePath.Substring(0, PicturePath.Length - 3) & "bmp" _imgPicture.Save(_PictureBmp, System.Drawing.Imaging.ImageFormat.Bmp) Else _PictureBmp = PicturePath End If ' Once bitmap, set the the wallpaper. SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, _PictureBmp, SPIF_UPDATEINIFILE Or SPIF_SENDWININICHANGE) Return True Catch ex As Exception Return False End Try Else Return False End If End Function End Class End Namespace |