Powershell - Auswahl aus Listbox soll Aktion ausführen

function GenerateForm {

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

#region Generated Form Objects
$form1 = New-Object System.Windows.Forms.Form
$btnRun = New-Object System.Windows.Forms.Button
$comboBox1 = New-Object System.Windows.Forms.ComboBox
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
#endregion Generated Form Objects

$handler_btnRun_Click= 
{
    switch($comboBox1.SelectedItem){
        "Aktion 1" {  
            [System.Windows.Forms.MessageBox]::Show("Aktion 1")  
        }
        "Aktion 2" {  
            [System.Windows.Forms.MessageBox]::Show("Aktion 2")  
        }
        "Aktion 3" {  
            [System.Windows.Forms.MessageBox]::Show("Aktion 3")  
        }
    }
    $form1.Close()
}

$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 = 47
$System_Drawing_Size.Width = 235
$form1.ClientSize = $System_Drawing_Size
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$form1.Name = "form1"  
$form1.Text = "Demo Listbox"  

$btnRun.Anchor = 9

$btnRun.DataBindings.DefaultDataSourceUpdateMode = 0

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 148
$System_Drawing_Point.Y = 12
$btnRun.Location = $System_Drawing_Point
$btnRun.Name = "btnRun"  
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 75
$btnRun.Size = $System_Drawing_Size
$btnRun.TabIndex = 1
$btnRun.Text = "Run"  
$btnRun.UseVisualStyleBackColor = $True
$btnRun.add_Click($handler_btnRun_Click)

$form1.Controls.Add($btnRun)

$comboBox1.Anchor = 13
$comboBox1.DataBindings.DefaultDataSourceUpdateMode = 0
$comboBox1.FormattingEnabled = $True
$comboBox1.Items.AddRange(@("Aktion 1","Aktion 2","Aktion 3"))  
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 12
$comboBox1.Location = $System_Drawing_Point
$comboBox1.Name = "comboBox1"  
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 21
$System_Drawing_Size.Width = 130
$comboBox1.Size = $System_Drawing_Size
$comboBox1.TabIndex = 0

$form1.Controls.Add($comboBox1)

#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

} #End Function

#Call the Function
GenerateForm