VBSript Shutdown Message Confusion - windows

Question

I am currently learning how to write commands in Visual Basic and decided to make a simple shutdown message. The code worked perfectly: when the user clicked 'yes' it shutdown and 'no', 'cancel' and the 'X' button closed the message.
However, I decided to try a make a prank message aswell, where the computer would shutdown whatever option was chosen. I ran the script, however when I clicked the 'X' icon (I did not fancy the idea of shutting down my computer!), my computer shutdown anyway :(
Is there a way to stop this happening, or, even better, is there a way to grey out the 'X' icon so the user cannot close the message?
Here is the code:
Option Explicit
Dim result
result = MsgBox ("Do you want to shutdown?", 3+48,"Warning")
Dim objShell
Select Case result
Case vbYes
MsgBox("shuting down ...")
Set objShell = WScript.CreateObject("WScript.Shell")
objShell.Run "C:\WINDOWS\system32\shutdown.exe -r -t 20"
Case vbNo
MsgBox("shuting down ...")
Set objShell = WScript.CreateObject("WScript.Shell")
objShell.Run "C:\WINDOWS\system32\shutdown.exe -r -t 20"
Case vbCancel
MsgBox("shuting down ...")
Set objShell = WScript.CreateObject("WScript.Shell")
objShell.Run "C:\WINDOWS\system32\shutdown.exe -r -t 20"
End Select
Cheers in advance! :D

Answer 1

-r : for reboot
-s : for shutdown
This Vbscript can create a shortcut on your desktop asking you if you want to shutdown the computer or not.
Option Explicit
Dim MyScriptPath
MyScriptPath = WScript.ScriptFullName
Call Shortcut(MyScriptPath,"Shutdown the computer")
Call AskQuestion()
'**********************************************************************************************
Sub Shortcut(PathApplication,Name)
Dim objShell,DesktopPath,objShortCut,MyTab
Set objShell = CreateObject("WScript.Shell")
MyTab = Split(PathApplication,"\")
If Name = "" Then
Name = MyTab(UBound(MyTab))
End if
DesktopPath = objShell.SpecialFolders("Desktop")
Set objShortCut = objShell.CreateShortcut(DesktopPath & "\" & Name & ".lnk")
objShortCut.TargetPath = Dblquote(PathApplication)
ObjShortCut.IconLocation = "%SystemRoot%\system32\SHELL32.dll,-28"
objShortCut.Save
End Sub
'**********************************************************************************************
Sub AskQuestion()
Dim Question,Msg,Title
Title = "Shutdown the computer"
Msg = "Are you sure to shutdown the computer now ?"& Vbcr &_
"If yes, then click [YES] button "& Vbcr &_
"If not, then click [NO] button"
Question = MsgBox (Msg,VbYesNo+VbQuestion,Title)
If Question = VbYes then
Call Run_Shutdown(30)
else
WScript.Quit()
End if
End Sub
'**********************************************************************************************
Function DblQuote(Str)
DblQuote = Chr(34) & Str & Chr(34)
End Function
'**********************************************************************************************
Sub Run_Shutdown(N)
Dim ws,Command,Execution
Set ws = CreateObject("wscript.Shell")
Command = "Cmd /c Shutdown -s -t "& N &" -c "& DblQuote("Save your work because your PC will shut down in "& N &" seconds")
Execution = ws.run(Command,0,True)
End sub
'**********************************************************************************************

Answer 2

Ok, is there a reason for trying to remove/disable the X? I ask because it will be kinda difficult though it can be done.
Not all button combinations on the msgbox enable the X. Try vbAbortRetryIgnore and also try vbYesNo.
If a Cancel button is provided (all other combinations except vbOkOnly) then X is enabled
If only one button is displayed then X is enabled
This really makes it almost pointless to disable the button once you are aware of these things. Here's what happens when the above scenarios are displayed an user hits X vs clicking on a button
N/A. X button not enabled
MsgBox returns vbCancel
MsgBox returns value of only button
By the way, it is not just clicking X. When X is enabled, ESC will trigger same results.