当我单击Alt + Tab以任何形式它不应该切换到其他形式..它必须聚焦相同的形式..P [英] When I Click Alt+Tab In Any Form It Should Not Switch To Other Form..It Has To Focus The Same Form..P

问题描述

我在Vb.net尝试...没有得到适当的解决方案，请帮助我

解决方案

这不容易：你必须提供全局钩子序列在系统级别识别，而不是在应用程序级别识别。您可能还必须禁用CTRL + ALT + DEL，CTRL + SHIFT + TAB以及其他几个。



假设这不是恶意的程序 - 如果它是你可以去其他地方 - 在现代应用程序中这是一个非常非常糟糕的想法：如果你的应用程序对我这样做，我会以极端的偏见卸载它并要求我的钱！



我建议您不要试图查看 Kiosk模式 [ ^ ]：它适用于单应用程序计算机。

Hello，



有很多方法可以达到这个目的。



T他最简单的方法是创建一个继承自Form的新类并重写方法ProcessCmdKey

当捕获Ctrl-tab键击时，你需要返回False来停止它。

 Public Class MyForm 
 Inherits Form 
 
受保护的覆盖函数ProcessCmdKey（_ 
 ByRef msg作为消息，_ 
 ByVal keyData As Keys）As Boolean 
 
 Const WM_KEYDOWN As Integer =& H100 
 Const WM_SYSKEYDOWN As Integer =& H104 
 
 If（（msg.Msg = WM_KEYDOWN）或（msg.Msg = WM_SYSKEYDOWN））然后
选择Case（keyData）
 Case（Keys.Control或Keys.Tab）
'< ; CTRL> +< TAB>捕获
返回False 
结束选择
结束如果
 
返回MyBase.ProcessCmdKey（msg，keyData）
结束函数
 
结束类

然后使用此类作为MDI父窗口的基础而不是System.Windows.Form

 部分 类 MdiParent 
 继承 MyForm 

瓦列。

Am trying in Vb.net...not getting proper solution for this pls help me

解决方案

This is not easy: you have to provide global hooks as the sequence is recognised at the system level, not at application level. You will probably also have to disable CTRL+ALT+DEL, CTRL+SHIFT+TAB, and a couple of others as well.

Assuming this isn't a malicious program - and if it is you can go elsewhere - that is a very, very poor idea in modern apps: if your app did that to me I would uninstall it with extreme prejudice and demand my money back!

I would suggest that instead of trying that you look at Kiosk Mode[^] instead: it's meant for single-application computers.

Hello,

There are many ways to achieve this.

The simplest way is to create a new class that inherits from Form and override the method ProcessCmdKey
When the Ctrl-tab keystroke is captured you need to return False to stop it.

Public Class MyForm
    Inherits Form

    Protected Overrides Function ProcessCmdKey( _
        ByRef msg As Message, _
        ByVal keyData As Keys) As Boolean

        Const WM_KEYDOWN As Integer = &H100
        Const WM_SYSKEYDOWN As Integer = &H104

        If ((msg.Msg = WM_KEYDOWN) Or (msg.Msg = WM_SYSKEYDOWN)) Then
            Select Case (keyData)
                Case (Keys.Control Or Keys.Tab)
                    ' <CTRL> + <TAB> captured
                    Return False
            End Select
        End If

        Return MyBase.ProcessCmdKey(msg, keyData)
    End Function

End Class

Then use this class as the base of your MDI parent window instead of System.Windows.Form

Partial Class MdiParent
    Inherits MyForm

Valery.

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