Add signature to ps file

powershell.ps1

[System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")>Out-Null
Add-Type -AssemblyName PresentationCore
$Clipboard=[Windows.Clipboard]::GetText()
$Clipboard = $Clipboard -Replace '"', ""
#[System.Windows.Forms.MessageBox]::Show("Clipboard: " + $Clipboard)
$Pattern = "^[a-z]:\\[a-z\\_\s0-9\(\)]*\.exe"
[System.Reflection.Assembly]::LoadWithPartialName("Microsoft.VisualBasic")>Out-Null
Add-Type -AssemblyName system.Windows.Forms
#Если буфер обмена соответсвует шаблону, то не открываем диалоговое окно
If ($Clipboard -imatch $Pattern) {
    $FullGamePathExe = $Clipboard
}
Else {
    $OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
    $OpenFileDialog.Filter = "Exe (*.exe)|*.exe"
    $OpenFileDialog.FilterIndex = 2
    $OpenFileDialog.RestoreDirectory = $true
    $OpenFileDialog.ShowDialog()
    $FullGamePathExe = $OpenFileDialog.FileName
}
    #[System.Windows.Forms.MessageBox]::Show($FullGamePathExe)
    IF ($FullGamePathExe -match $Pattern) {
    If (Test-Path($FullGamePathExe)) {
       $Condition = $True
       #[System.Windows.Forms.MessageBox]::Show("Exist")
    }
    Else{
       $Condition = $False
       [System.Windows.Forms.MessageBox]::Show("NOT Exist")
    }
}
IF (-Not $Condition) { [System.Windows.Forms.MessageBox]::Show("Something Wrong!")}
If (-Not $Condition) { exit}
$strValue = "NoDTToDITMouseBatch"
$RegistyrPath = 'HKLM:SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers'
try {
    New-ItemProperty -Path $RegistyrPath -Name $FullGamePathExe -PropertyType String -Value $strValue
}
catch [System.IO.IOException] {
    [System.Windows.Forms.MessageBox]::Show("Опачки") 
  }
#Finally
#{
 # [System.Windows.Forms.MessageBox]::Show("Script Complete")  
#}
Rundll32 apphelp.dll,ShimFlushCache
# SIG # Begin signature block
# MIIFuQYJKoZIhvcNAQcCoIIFqjCCBaYCAQExCzAJBgUrDgMCGgUAMGkGCisGAQQB
# gjcCAQSgWzBZMDQGCisGAQQBgjcCAR4wJgIDAQAABBAfzDtgWUsITrck0sYpfvNR
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# SIG # End signature block