Powershell Probleme mit initialer Start-Wert-Befüllung einer DropDownList

function GenerateForm {

#region Import the Assemblies
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null  
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null  
#endregion

$script:quit = $false

#region Generated Form Objects
$form1 = New-Object System.Windows.Forms.Form
$button2 = New-Object System.Windows.Forms.Button
$button1 = New-Object System.Windows.Forms.Button
$DropDown = New-Object System.Windows.Forms.ComboBox
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
#endregion Generated Form Objects

#----------------------------------------------
#Generated Event Script Blocks
#----------------------------------------------
$handler_button2_Click= 
{
    $form1.Close()
    $script:quit = $true
}

$handler_button1_Click= 
{
    $DropDown.Items.Clear()
    1..10 | %{$DropDown.Items.Add($_)}
    $DropDown.SelectedIndex = 2
}

$OnLoadForm_StateCorrection=
{#Correct the initial state of the form to prevent the .Net maximized form issue
	$form1.WindowState = $InitialFormWindowState
}

#----------------------------------------------
#region Generated Form Code
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 103
$System_Drawing_Size.Width = 210
$form1.ClientSize = $System_Drawing_Size
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$form1.Name = "form1"  
$form1.Text = "Testform"  


$button2.DataBindings.DefaultDataSourceUpdateMode = 0

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 102
$System_Drawing_Point.Y = 55
$button2.Location = $System_Drawing_Point
$button2.Name = "button2"  
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 75
$button2.Size = $System_Drawing_Size
$button2.TabIndex = 2
$button2.Text = "exit"  
$button2.UseVisualStyleBackColor = $True
$button2.add_Click($handler_button2_Click)

$form1.Controls.Add($button2)


$button1.DataBindings.DefaultDataSourceUpdateMode = 0

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 55
$button1.Location = $System_Drawing_Point
$button1.Name = "button1"  
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 75
$button1.Size = $System_Drawing_Size
$button1.TabIndex = 1
$button1.Text = "set index"  
$button1.UseVisualStyleBackColor = $True
$button1.add_Click($handler_button1_Click)

$form1.Controls.Add($button1)

$DropDown.DataBindings.DefaultDataSourceUpdateMode = 0
$DropDown.DropDownStyle = 2
$DropDown.FormattingEnabled = $True
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 12
$DropDown.Location = $System_Drawing_Point
$DropDown.Name = "DropDown"  
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 21
$System_Drawing_Size.Width = 165
$DropDown.Size = $System_Drawing_Size
$DropDown.TabIndex = 0

$form1.Controls.Add($DropDown)

#endregion Generated Form Code

#Save the initial state of the form
$InitialFormWindowState = $form1.WindowState
#Init the OnLoad event to correct the initial state of the form
$form1.add_Load($OnLoadForm_StateCorrection)
#Show the Form
$form1.ShowDialog()| Out-Null

# gebe den Wert aus der Function zurück
return $script:quit
} #End Function

#Call the Function
$result = GenerateForm

# wenn $true zurückgegeben wird beende Script
if($result){
    exit
}
# Script wird weiter ausgeführt wenn die Form $false zurückgibt
write-host "Script continues here ..."