For the ppl who want to learn more, try understand this and how this code works:
[php]Dim msg As String
Dim title As String
Dim style As MsgBoxStyle
Dim response As MsgBoxResult
msg = "Do you want to continue?" ' Define message.
style = MsgBoxStyle.DefaultButton2 Or _
MsgBoxStyle.Critical Or MsgBoxStyle.YesNo
title = "MsgBox Demonstration" ' Define title.
' Display message.
response = MsgBox(msg, style, title)
If response = MsgBoxResult.Yes Then ' User chose Yes.
' Perform some action.
Else
' Perform some other action.
End If[/php]