Custom Logon Screen GUI Tool for Windows 7

Custom Logon Screen GUI tool will help you change the default Windows 7 logon screen background.
All you need to do is to select the desired image, and click Change Logon Screen button to apply it.
Few things you should be aware of:
-Don’t forget to run the tool as administrator.
-The selected image file size should NOT exceed 256KB.
-A single registry edit will be performed in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background changing OEMBackground value to 1.

Download:
Windows 7 Logon Screen Changer – GUI PowerShell Tool

The Code:

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###############################################################################################################

# This tool will help you to change the default Windows 7 logon screen background. #

# All you need to do is to select the desired image, and click Change Logon Screen button to apply it. #

# Author: Nikolay Petkov #

# Blog: http://77.104.138.174/~powershe/power-shell.com #

###############################################################################################################

[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")

[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")

$Form = New-Object System.Windows.Forms.Form

$Form.Text = "Windows 7 Custom Logon Screen"

$Form.Size = New-Object System.Drawing.Size(610,480)

$Form.StartPosition = "CenterScreen" #loads the window in the center of the screen

$Icon = [system.drawing.icon]::ExtractAssociatedIcon($PSHOME + "\powershell.exe")

$Form.BackgroundImageLayout = "Zoom"

# None, Tile, Center, Stretch, Zoom

$Form.MinimizeBox = $False

$Form.MaximizeBox = $False

$Form.WindowState = "Normal"

# Maximized, Minimized, Normal

$Form.SizeGripStyle = "Hide"

# Auto, Hide, Show

$Form.Icon = $Icon

$Form.MinimizeBox = $False

$Form.MaximizeBox = $False

############################################## Start Labels & Picture Box

########### PictureBox Label

$PictureBoxLabel = New-Object System.Windows.Forms.Label

$PictureBoxLabel.Text="Current Logon Screen"

$PictureBoxLabel.Visible = $False

$PictureBoxLabel.Location = New-Object System.Drawing.Size(250,20)

$PictureBoxLabel.Size = New-Object System.Drawing.Size(300,50)

$Form.Controls.Add($PictureBoxLabel)

########### Input PictureBox

$defbackground = [System.Drawing.Image]::Fromfile((get-item $env:SystemRoot\system32\oobe\background.bmp));

$PictureBox = New-Object System.Windows.Forms.PictureBox

$PictureBox.Location = "185, 20"

$pictureBox.Width = 400

$pictureBox.Height = 300

#$PictureBox.ClientSize = "480, 300"

$PictureBox.Image = $defbackground

#$PictureBox.BackColor = "Black"

$PictureBox.SizeMode = "Zoom"

$Form.Controls.Add($PictureBox)

############################################## Start Buttons

########### Open File Button

$OpenFile = New-Object System.Windows.Forms.Button

$OpenFile.Location = New-Object System.Drawing.Size(15,20)

$OpenFile.Size = New-Object System.Drawing.Size(150,60)

$OpenFile.Text = "Select Background Image"

$OpenFile.Add_Click({OpenFile})

$OpenFile.Cursor = [System.Windows.Forms.Cursors]::Hand

$Form.Controls.Add($OpenFile)

########### Change Background Button

$ChangeBkg = New-Object System.Windows.Forms.Button

$ChangeBkg.Visible = $False

$ChangeBkg.Location = New-Object System.Drawing.Size(15,100)

$ChangeBkg.Size = New-Object System.Drawing.Size(150,60)

$ChangeBkg.Text = "Change Logon Screen"

$ChangeBkg.Add_Click({ChangeLogon})

$ChangeBkg.Cursor = [System.Windows.Forms.Cursors]::Hand

$Form.Controls.Add($ChangeBkg)

########### Lock Workstation Button

$LockComputer = New-Object System.Windows.Forms.Button

$LockComputer.Visible = $False

$LockComputer.Location = New-Object System.Drawing.Size(15,180)

$LockComputer.Size = New-Object System.Drawing.Size(150,60)

$LockComputer.Text = "Lock Computer"

$LockComputer.Add_Click({LockComputer})

$LockComputer.Cursor = [System.Windows.Forms.Cursors]::Hand

$Form.Controls.Add($LockComputer)

########### Reverse Button

$Reverse = New-Object System.Windows.Forms.Button

$Reverse.Visible = $False

$Reverse.Location = New-Object System.Drawing.Size(15,260)

$Reverse.Size = New-Object System.Drawing.Size(150,60)

$Reverse.Text = "Reverse Settings"

$Reverse.Add_Click({Reverse})

$Reverse.Cursor = [System.Windows.Forms.Cursors]::Hand

$Form.Controls.Add($Reverse)

############################################## end Buttons

############################################## Start Functions

########### OpenFile Function

Function OpenFile {

$OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog

$openFileDialog.Title = "Select Background Image"

$OpenFileDialog.initialDirectory = [Environment]::GetFolderPath("mypictures")

$OpenFileDialog.filter = "Image Files (*.bmp, *.jpg)| *.bmp;*.jpg | All files (*.*)| *.*"

$openFileDialog.FilterIndex = 2

$validate = $openFileDialog.ShowDialog()

If ($validate -eq "OK") {

InputImage($openFileDialog.FileName)

$PictureBoxLabel.Text = $openFileDialog.FileName

}

} #end function OpenFile

########### InputImage Function

Function InputImage {

$file = (Get-Item $openFileDialog.FileName)

$image = [System.Drawing.Image]::Fromfile($file)

$PictureBox.Image = $image

#Image details

$imagedimension = $image.PhysicalDimension -replace ("{"," ") -replace ("}"," ") |Out-String

$filename = $openFileDialog.FileName

$filesize = [math]::truncate((Get-Item $filename).length /1KB),"KB"

if ((Get-Item $filename).length -gt 256kb)

{

$filesize = "$filesize `n`n Error: The file size should NOT exceed 256KB! Please choose another image."

$ChangeBkg.Visible =$false

$LockComputer.Visible = $False

$Reverse.Visible = $False

$outputBox.text= " Selected Background: $filename", "`n Image Dimensions: $imagedimension", "File Size: $filesize"

}

else {

$ChangeBkg.Visible = $True

$outputBox.text= " Selected Background: $filename", "`n Image Dimensions: $imagedimension", "File Size: $filesize", "`n`n Status OK: Click on ""Change Logon Screen"" button to proceed."

}

} #end function OpenFile

########### Change Logon Function

Function ChangeLogon {

$infopath = "$env:SystemRoot\system32\oobe\info"

if(!(Test-Path $infopath))

{

new-item -path $infopath, $infopath\backgrounds -ItemType directory | Out-Null

}

Copy-Item $PictureBoxLabel.Text $infopath\backgrounds\backgroundDefault.jpg -force

#Change Regisry Key

$RegKey ="HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background"

if(!(Get-ItemProperty $RegKey -Name OEMBackground |Where-Object {$_.OEMBackground -like "1"}))

{Set-ItemProperty -Path $RegKey -Name OEMBackground -Value 1}

$LockComputer.Visible = $True

$Reverse.Visible = $True

$outputBox.text= " Your new logon screen background has been applied successfully.`n You can now lock your PC, log off or reboot to see the result."

} #end function Change Logon

########### Lock Computer Function

function LockComputer {

$shell = New-Object -com “Wscript.Shell”

$shell.Run(“%windir%\System32\rundll32.exe user32.dll,LockWorkStation”)

} #end function Lock Computer

########### Reverse Settings Function

function Reverse {

$infopath = "$env:SystemRoot\system32\oobe\info"

$RegKey ="HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background"

Set-ItemProperty -Path $RegKey -Name OEMBackground -Value 0

If (Test-Path -Path $infopath) {Remove-Item -path $infopath -recurse -force | Out-Null}

$outputBox.text= " Your settings have been restored to defaults. `

`n Visit http://77.104.138.174/~powershe/power-shell.com for more PowerShell GUI tools."

} #end function Reverse

############################################## end Functions

############################################## Start text fields

########### URL Field

$HomeLabel = New-Object System.Windows.Forms.LinkLabel

$HomeLabel.Location = New-Object System.Drawing.Size(470,430)

$HomeLabel.Size = New-Object System.Drawing.Size(115,20)

$HomeLabel.LinkColor = "#0074A2"

$HomeLabel.ActiveLinkColor = "#114C7F"

$HomeLabel.Text = "http://77.104.138.174/~powershe/power-shell.com"

$HomeLabel.add_Click({[system.Diagnostics.Process]::start("http://77.104.138.174/~powershe/power-shell.com")})

$Form.Controls.Add($HomeLabel)

########### Info Box Field

$outputBox = New-Object System.Windows.Forms.RichTextBox

$outputBox.Location = New-Object System.Drawing.Size(15,340)

$outputBox.Size = New-Object System.Drawing.Size(570,80)

$outputBox.MultiLine = $True

$outputBox.ScrollBars = "Vertical"

$outputBox.Text = " This tool will help you to change the default Windows 7 logon screen background. `

-Don't forget to run it as administrator.

-The selected image file size should NOT exceed 256KB. `

-A single registry edit will be performed in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\Background changing OEMBackground value to 1."

$Form.Controls.Add($outputBox)

############################################## end text fields

$Form.Add_Shown({$Form.Activate()})

[void] $Form.ShowDialog()

PowerShell Blog

Custom Logon Screen GUI Tool for Windows 7

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