Powershell: Ist bei Programmierung einer GUI die Darstellung des Kommandofensters unbedingt notwendig?

powershell.exe -ExecutionPolicy Bypass -File "C:\powershell_tests\testscript1.ps1" -param1 "Parameter eins"  

[CmdletBinding()]
Param 
(
	[Parameter(Mandatory=$true)][string]$param1
)

BEGIN {
    if([string]::IsNullOrEmpty($param1))
    {
        $param1 = ""  
    }

    
}

PROCESS {
    #nested methodes

    Function Main()
    {
        Param 
        (
	        [Parameter(Mandatory=$true)][string]$param1
        )

        #Read-host "in Function MAIN() drin"  

        #Write-Host $param1

        #Read-host "gleich ruft Function MAIN() die Function Second() auf"  

        return Second -param1 $param1
    }

    Function Second()
    {
        Param 
        (
	        [Parameter(Mandatory=$true)][string]$param1
        )



        #Read-host "jetzt in Function Second() drin"  

        #Write-Host $param1

        if( (get-host).Name -eq "ConsoleHost")  
        {
            #######################################
            #   Konsolenfenster: Groesse anpassen #
            #######################################
            SetConsoleWindow -Width 70 -Height 15
    
            #ToDo: Fenster c:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe schliessen
    
            ############################################
            #  Funktion: Windows-Form                  #
            ############################################
            GenerateForm -param1 $param1
     
    
        }


<#
        ...
        ...
#>


    #Read-host "gleich aus Function Second() und wegen dem retrun in Funktion MAIN aus MAIN() und damit ganz aus dem Skript drausen"  

    }

    function GenerateForm()
    {
      
        Param 
        (
	        [Parameter(Mandatory=$true)][string]$param1
        )

        #region Import the Assemblies
        [reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null  
        [reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null  
        #endregion
    
        #region Generated Form Objects
        $objForm = New-Object System.Windows.Forms.Form
        $objLabel1 = New-Object System.Windows.Forms.Label
        $objTestButton = New-Object System.Windows.Forms.Button
    
        $InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
        

        $handler_objTestButton_Click= 
        {
            $objForm.Close()
        }

        # Formular Lade-Funktion  
        $OnLoadForm_StateCorrection=
        {
            #Correct the initial state of the form to prevent the .Net maximized form issue
            $objForm.WindowState = $InitialFormWindowState
        }
    
        #----------------------------------------------
        #region Generated Form Code
    
        #$objLabel1.Location = New-Object System.Drawing.Size(100,20)
        $objForm.ClientSize = New-Object System.Drawing.Size(600,300)
        $objForm.DataBindings.DefaultDataSourceUpdateMode = 0
        $objForm.Backcolor="white"  
        $objForm.BackgroundImageLayout = 2
        $objForm.StartPosition = "CenterScreen"  
        $objForm.Name = "Form1"  
        $objForm.Text =  "PowerShell Testprojekt"  
    
        #Statusleiste
        $objStatusLeiste=New-Object System.Windows.Forms.StatusBar
        $objStatusLeiste.Text="Auswahl: Noch nicht getroffen"  
        $objStatusLeiste.Name="StatusLeiste"  
        $objForm.Controls.Add($objStatusLeiste)
    
        #Label1
        $objLabel1.Location = New-Object System.Drawing.Size(30,20)
        $objLabel1.Size = New-Object System.Drawing.Size(250,20)
        $objLabel1.Text = $param1
        $objForm.Controls.Add($objLabel1)

         #OTest Button 
        $objTestButton.Anchor = 9
        $objTestButton.DataBindings.DefaultDataSourceUpdateMode = 0
        $objTestButton.Location = New-Object System.Drawing.Size(500,250) #340
        $objTestButton.Size = New-Object System.Drawing.Size(75,23) 
        $objTestButton.Name = "objTestButton"  
        $objTestButton.TabIndex = 1
        $objTestButton.Text = "Close Form"  
        $objTestButton.UseVisualStyleBackColor = $True
        $objTestButton.add_Click($handler_objTestButton_Click)
        $objForm.Controls.Add($objTestButton)
    
        #endregion Generated Form Code
    
 
    

        #Save the initial state of the form
        $InitialFormWindowState = $objForm.WindowState
        #Init the OnLoad event to correct the initial state of the form
        $objForm.add_Load($OnLoadForm_StateCorrection)
    
    
        #Show the Form
        $objForm.ShowDialog()| Out-Null
    
    
    } #End Function

    function SetConsoleWindow()
    {
 

        param(
               [int]$Width,
                [int]$Height
        )   


        $WindowSize = $Host.UI.RawUI.WindowSize
        $WindowSize.Width  = [Math]::Min($Width, $Host.UI.RawUI.BufferSize.Width)
        $WindowSize.Height = $Height

        try{
            $Host.UI.RawUI.WindowSize = $WindowSize
        }
        catch [System.Management.Automation.SetValueInvocationException] 
        {
            $Maxvalue = ($_.Exception.Message |Select-String "\d+").Matches.Value  
            $WindowSize.Height = $Maxvalue
            $Host.UI.RawUI.WindowSize = $WindowSize
        }
    } #End Function
    

    $result = Main -param1 $param1

}
END {
    #final doings like return a value
    return $result
}