Powershell Out-Gridview bestimtme Column

function Out-GridViewCustom {
param(
    [parameter(mandatory=$false,ValueFromPipeline=$true)]$data,
    [parameter(mandatory=$false)][string[]]$showColumns,
    [parameter(mandatory=$false)][string]$title,
    [parameter(mandatory=$false)][ValidateSet("Multiple","Single")]$OutputMode = "Multiple"  
)
    begin{
        
        #region Import the Assemblies
        [reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null  
        [reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null  
        #endregion
        $script:selectedData = $null
        $script:hiddenColumns = $null
        $all = @()
    }
    process{
        if ($data -ne $null){
            $all += $data
        }
    }

    end{
        $formMain = New-Object System.Windows.Forms.Form
        $btnOK = New-Object System.Windows.Forms.Button
        $dgv = New-Object System.Windows.Forms.DataGridView
        $btnHiddenColumns = New-Object System.Windows.Forms.Button
        $InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState

        #----------------------------------------------
        # Event Script Blocks
        #----------------------------------------------
        $handler_btnOK_Click= 
        {
            if ($dgv.SelectedRows.Count -gt 0){
                $script:selectedData = $dgv.SelectedRows.DataBoundItem
            }
            $formMain.Close()
        }

        $handler_formMain_Load= 
        {
            if($title){
                $formMain.Text = $title
            }
            if ($all.Count -eq 0){
                $btnHiddenColumns.Enabled = $false
                return
            }
            $arrList = New-Object System.Collections.ArrayList
            $arrList.AddRange(@($all))
            $dgv.DataSource = $arrList

            if ($showColumns.Count -gt 0){
                $colIndex = 0
                $cols = $all | gm -MemberType Properties| select -Expand Name
                $showColumns | ?{$_ -in $cols} | %{
                    $dgv.Columns[$_].DisplayIndex = $colIndex
                    $colIndex++
                }
                
                $script:hiddenColumns = $dgv.Columns.Name | ?{$_ -notin $showColumns} 
                $script:hiddenColumns | %{$dgv.Columns[$_].Visible = $false}
                if ($script:hiddenColumns.count -eq 0){
                    $btnHiddenColumns.Enabled = $false
                }
            }else{
                $btnHiddenColumns.Enabled = $false
            }
        }
        $handler_btnHiddenColumns_Click= 
        {
            if ([System.Windows.Forms.MessageBox]::Show("Folgende Spalten sind ausgeblendet:`n`n- $($script:hiddenColumns -join "`n- ")`n`nMöchten Sie sie jetzt einblenden?","Spalten einblenden",4,32) -eq 6){  
                $script:hiddenColumns | %{$dgv.Columns[$_].Visible = $true}
                $btnHiddenColumns.Enabled = $false
            }
        }
        $OnLoadForm_StateCorrection=
        {#Correct the initial state of the form to prevent the .Net maximized form issue
	        $formMain.WindowState = $InitialFormWindowState
        }

        #----------------------------------------------
        #region Generated Form Code
        $System_Drawing_Size = New-Object System.Drawing.Size
        $System_Drawing_Size.Height = 452
        $System_Drawing_Size.Width = 632
        $formMain.ClientSize = $System_Drawing_Size
        $formMain.DataBindings.DefaultDataSourceUpdateMode = 0
        $formMain.Name = "formMain"  
        $formMain.Text = "DataGrid"  
        $formMain.add_Load($handler_formMain_Load)

        $btnHiddenColumns.Anchor = 6
        $btnHiddenColumns.DataBindings.DefaultDataSourceUpdateMode = 0
        $System_Drawing_Point = New-Object System.Drawing.Point
        $System_Drawing_Point.X = 12
        $System_Drawing_Point.Y = 417
        $btnHiddenColumns.Location = $System_Drawing_Point
        $btnHiddenColumns.Name = "btnHiddenColumns"  
        $System_Drawing_Size = New-Object System.Drawing.Size
        $System_Drawing_Size.Height = 23
        $System_Drawing_Size.Width = 113
        $btnHiddenColumns.Size = $System_Drawing_Size
        $btnHiddenColumns.TabIndex = 2
        $btnHiddenColumns.Text = "Spalten einblenden"  
        $btnHiddenColumns.UseVisualStyleBackColor = $True
        $btnHiddenColumns.add_Click($handler_btnHiddenColumns_Click)
        $formMain.Controls.Add($btnHiddenColumns)


        $btnOK.Anchor = 10
        $btnOK.DataBindings.DefaultDataSourceUpdateMode = 0
        $System_Drawing_Point = New-Object System.Drawing.Point
        $System_Drawing_Point.X = 545
        $System_Drawing_Point.Y = 417
        $btnOK.Location = $System_Drawing_Point
        $btnOK.Name = "btnOK"  
        $System_Drawing_Size = New-Object System.Drawing.Size
        $System_Drawing_Size.Height = 23
        $System_Drawing_Size.Width = 75
        $btnOK.Size = $System_Drawing_Size
        $btnOK.TabIndex = 1
        $btnOK.Text = "OK"  
        $btnOK.UseVisualStyleBackColor = $True
        $btnOK.add_Click($handler_btnOK_Click)
        $formMain.Controls.Add($btnOK)

        $dgv.Anchor = 15
        $dgv.DataBindings.DefaultDataSourceUpdateMode = 0
        $System_Drawing_Point = New-Object System.Drawing.Point
        $System_Drawing_Point.X = 12
        $System_Drawing_Point.Y = 12
        $dgv.Location = $System_Drawing_Point
        $dgv.Name = "dgv"  
        $System_Drawing_Size = New-Object System.Drawing.Size
        $System_Drawing_Size.Height = 399
        $System_Drawing_Size.Width = 608
        $dgv.Size = $System_Drawing_Size
        $dgv.TabIndex = 0
        $dgv.SelectionMode = 1
        $dgv.MultiSelect = $OutputMode -eq "Multiple"  
        $dgv.AllowUserToAddRows = $false
        $dgv.AllowUserToResizeRows = $false
        $dgv.AllowUserToDeleteRows = $false
        $dgv.ReadOnly = $true

        $formMain.Controls.Add($dgv)

        #Save the initial state of the form
        $InitialFormWindowState = $formMain.WindowState
        #Init the OnLoad event to correct the initial state of the form
        $formMain.add_Load($OnLoadForm_StateCorrection)
        #Show the Form
        $formMain.ShowDialog()| Out-Null
        # return selected data
        return $script:selectedData
    }
} #End Function

# testdaten erzeugen 
$mydata = get-service
# ... und mit custom gridview anzeigen lassen
$mydata | Out-GridViewCustom -showColumns Status,Name,DisplayName -title "Das ist ein Titel"