以Powershell形式禁用Alt + F4 [英] Disabling Alt+F4 in a Powershell form

问题描述

我编写了一个Powershell脚本，该脚本使用 System.Windows.Forms 显示一个表单.我已经禁用了控制框以及通过鼠标关闭此表单的所有其他方式.但是我找不到通过按 Alt + F4 防止表单关闭的方法.

I've written a powershell script which displays a form using System.Windows.Forms. I've already disabled the control box and all other ways that this form can be closed via the mouse. But I can't find a way of preventing the form closing by pressing Alt+F4.

即代码段如下所示:

[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") 
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing") 
$objForm = New-Object System.Windows.Forms.Form 
$objForm.Text = "Restart Required"
$objForm.Size = New-Object System.Drawing.Size(400,300) 
$objForm.StartPosition = "CenterScreen"
$objForm.KeyPreview = $True
$objForm.Topmost = $True
$objForm.MinimizeBox = $false
$objForm.MaximizeBox = $false
$objForm.FormBorderStyle = "Fixed3d" 
$objForm.ControlBox = $false
$objForm.ShowInTaskbar = $false
$objForm.Add_Shown({$objForm.Activate()})
[void] $objForm.ShowDialog()

查看

Looking at MSDN, there are articles about overriding the FormClosing eventhandler in VB, C#, etc and . But I'm not sure how to implement similar logic into Powershell (if it's at all possible).

推荐答案

将表单keypreview设置为true

Set forms keypreview to true

$form1_KeyDown=[System.Windows.Forms.KeyEventHandler]{
    #Event Argument: $_ = [System.Windows.Forms.KeyEventArgs]

    if ($_.Alt -eq $true -and $_.KeyCode -eq 'F4') {
        $script:altF4Pressed = $true;           
    }
}

$form1_FormClosing=[System.Windows.Forms.FormClosingEventHandler]{
    #Event Argument: $_ = [System.Windows.Forms.FormClosingEventArgs]

    if ($script:altF4Pressed)
    {
        if ($_.CloseReason -eq 'UserClosing') {
            $_.Cancel = $true
            $script:altF4Pressed = $false;
        }
    }
}

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