Powershell - CheckedListBox mit DataSource, Checked Items entfernen

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

$form1 = New-Object System.Windows.Forms.Form
$btnDeleteItems = New-Object System.Windows.Forms.Button
$lb = New-Object System.Windows.Forms.CheckedListBox
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState

# generate demo datasource
$global:datasource = New-Object System.Data.DataTable
$global:datasource.Columns.Add("Name")  
$global:datasource.Rows.Add("Max Muster")  
$global:datasource.Rows.Add("Anna Musterfrau")  
$global:datasource.Rows.Add("Herbert Dietrich")  
$global:datasource.Rows.Add("Franz Dichter")  

$handler_form1_Load= 
{
    # set datasource of listbox
    $lb.DataSource = $global:datasource
    # set display ad value member for listbox
    $lb.DisplayMember = "Name"  
    $lb.ValueMember = "Name"  
}

$handler_btnDeleteItems_Click= 
{
    # remove checked rows from datasource
     $lb.CheckedItems.Row | %{$global:datasource.Rows.Remove($_)}
    
}

$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 = 174
$System_Drawing_Size.Width = 292
$form1.ClientSize = $System_Drawing_Size
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$form1.Name = "form1"  
$form1.Text = "CheckedListBox item removal"  
$form1.add_Load($handler_form1_Load)

$btnDeleteItems.Anchor = 14

$btnDeleteItems.DataBindings.DefaultDataSourceUpdateMode = 0

$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 142
$btnDeleteItems.Location = $System_Drawing_Point
$btnDeleteItems.Name = "btnDeleteItems"  
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 23
$System_Drawing_Size.Width = 268
$btnDeleteItems.Size = $System_Drawing_Size
$btnDeleteItems.TabIndex = 1
$btnDeleteItems.Text = "Delete checked items"  
$btnDeleteItems.UseVisualStyleBackColor = $True
$btnDeleteItems.add_Click($handler_btnDeleteItems_Click)

$form1.Controls.Add($btnDeleteItems)

$lb.Anchor = 15
$lb.DataBindings.DefaultDataSourceUpdateMode = 0
$lb.FormattingEnabled = $True
$System_Drawing_Point = New-Object System.Drawing.Point
$System_Drawing_Point.X = 12
$System_Drawing_Point.Y = 12
$lb.Location = $System_Drawing_Point
$lb.Name = "lb"  
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Height = 124
$System_Drawing_Size.Width = 268
$lb.Size = $System_Drawing_Size
$lb.TabIndex = 0

$form1.Controls.Add($lb)

#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