Question

是否可以使默认消息框（MessageBox.Show()）TopMost为true，即使消息框失去焦点也会保持在顶部？我不想创建自定义的。有没有办法使用SetWindowHook或类似的东西？我已经研究了很多，但我找到的所有解决方案都没有用。有人可以帮我解决如何在VB.net或C＃中做到这一点吗？

Answer 1

最简单的方法是p /调用MessageBox函数并传递MB_SYSTEMMODAL标志。

Answer 2

我明白了。这将在所有打开的窗口上显示一个消息框，如果他们有最顶层选项并不重要，则消息框始终显示在前面。

    Public Enum MessageBoxResult As UInteger
        Ok = 1
        Cancel
        Abort
        Retry
        Ignore
        Yes
        No
        Close
        Help
        TryAgain
        ContinueOn
        Timeout = 32000
    End Enum

    Public Enum MessageBoxOptions As UInteger
        SystemModal = &H1000
        NoFocus = &H8000
        SetForeground = &H10000
        Topmost = &H40000
    End Enum

    <DllImport("user32.dll", EntryPoint:="MessageBoxW", SetLastError:=True, Charset:=CharSet.Unicode)> _
    Public Shared Function MessageBox(hwnd As IntPtr, _
      <MarshalAs(UnmanagedType.LPTStr)> lpText As String, _
      <MarshalAs(UnmanagedType.LPTStr)> lpCaption As String, _
      <MarshalAs(UnmanagedType.U4)> uType As MessageBoxOptions) As <MarshalAs(UnmanagedType.U4)> MessageBoxResult
    End Function

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
        MessageBox(IntPtr.Zero, TextBox2.Text, TextBox1.Text, MessageBoxButtons.OK Or MessageBoxOptions.SystemModal + MessageBoxOptions.Topmost + MessageBoxOptions.SetForeground + MessageBoxIcon.Information)
    End Sub
End Class

MessageBox Top True True

2 个答案: