我正试图得到一个表单来显示脚本的后台进度，并有能力在脚本完成后通过按钮关闭它。文本框刷新后，但我不能按下按钮。请告知。

Add-Type -AssemblyName System.Windows.Forms

Function ButtonClick
{
    $mainForm.Close()
}

[System.Windows.Forms.Application]::EnableVisualStyles()
$button = New-Object 'System.Windows.Forms.Button'
$button.Location = '10, 10'
$button.Name = "buttonGo"
$button.Size = '75, 25'
$button.TabIndex = 0
$button.Text = "&Go"
$button.UseVisualStyleBackColor = $true
$button.Add_Click({ButtonClick})

$textBoxDisplay = New-Object 'System.Windows.Forms.TextBox'
$textBoxDisplay.Location = '12, 50'
$textBoxDisplay.Multiline = $true
$textBoxDisplay.Name = "textBoxDisplay"
$textBoxDisplay.Size = '470, 150'
$textBoxDisplay.TabIndex = 1

$mainForm = New-Object 'System.Windows.Forms.Form'
$mainForm.Size = '500, 250'
$mainForm.Controls.Add($button)
$mainForm.Controls.Add($textBoxDisplay)
$mainForm.FormBorderStyle = [System.Windows.Forms.FormBorderStyle]::FixedDialog
$mainForm.Name = "mainForm"
$mainForm.Text = "Show Get-NetConnectionProfile Output"

cls
$mainForm.Show()

$1 = @([pscustomobject]@{name = 'Time'},
        [pscustomobject]@{name = 'Zenek'},
        [pscustomobject]@{name = 'NetEx'},
        [pscustomobject]@{name = 'Busy'},
        [pscustomobject]@{name = 'Shorts'})

$1|%{$textBoxDisplay.Text += "$($_.name) already present`r`n"; $textBoxDisplay.Refresh(); Start-Sleep -s 2}