解决方案 | vbnet的msgbox 窗口最前置，topmost属性设置

For that you can use the TopMost Property of MsgBox (Number 262144)

MsgBox("Hello there", 262144, Title:="Out of focus")

Edit: Another way to accomplish this is creating a temporary form

Using form = New Form() With {.TopMost = True}
    MessageBox.Show(form, "Hello there", "Out of focus")
End Using

使用选项262144即可前置窗口，也就是 topmost

MsgBox("Hello there", 262144, Title:="Out of focus")

参考资料

https://stackoverflow.com/questions/20657991/vb-net-and-mb-topmost-for-dialogs