Question

是否可以使用VB.NET更改桌面背景？

我也想改变图标吗？

我计划制作一个VB.NET程序，只需点击一下即可自动使Windows XP看起来像Mac。

Answer 1

'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)

Answer 2

试试这个程序：

Imports System
Imports System.Runtime.InteropServices

Public Class Desktop

    Public Shared SPI_SETDESKTOPWALLPAPER As Integer = 20
    Public Shared SPIF_UPDATEINIFILE As Integer = 1
    Public Shared SPIF_SENDWININICHANGE As Integer = 2

    Public Shared Sub Main(ByVal args() As String)
        If (args.Length = 1) Then
            SystemParametersInfo(SPI_SETDESKTOPWALLPAPER, 0, args(0), _ 
            (SPIF_UPDATEINIFILE Or SPIF_SENDWININICHANGE))
        End If
    End Sub

    Private Declare Sub SystemParametersInfo Lib "User32.dll" (ByVal action As Integer, _ 
        ByVal iparam As Integer, ByVal vparam As String, ByVal option As Integer)

End Class

Answer 3

您可以使用Win32'user32'来更改桌面背景。你需要声明user32 pi函数SystemParametersInfo，如：

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

并使用有效参数调用此函数

你也可以查看这个链接，这是学习如何在vb.net中更改桌面背景的好文章

http://www.authorcode.com/how-to-set-desktop-background-in-vb-net/

Answer 4

这是一个简单而实用的代码，仅使用计时器设置桌面

Public Class Form1

   Dim Location As String

   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 Const SETDESKWALLPAPER = 20
   Private Const UPDATEINIFILE = &H1

   Private Sub Timer1_Tick(sender As Object, e As EventArgs) Handles Timer1.Tick

       Location = ("image directory.jpg")

       PictureBox1.BackgroundImage = Image.FromFile("C:\Users\Danny\Desktop\Hacker.jpg")

       PictureBox1.BackgroundImageLayout = ImageLayout.Stretch

       SystemParametersInfo(SETDESKWALLPAPER, 0, Location, UPDATEINIFILE)

   End Sub     End Class

使用VB.NET更改桌面背景

4 个答案: