Think about this for a moment: You are running your ASP code on a Server machine in Lower Franconia, South Texas. Your user is in an airplane flying over Zurich, Switzerland.
In the course of processing some database function or some file function or who knows what, you discover that you want to "pop up" some message to your user. So you ask VBScript to do a MsgBox to display the message.
But remember, your code is running on that server in South Texas. Where do you suppose that MsgBox is going to "pop up"? Yep, on the system console of the Server box that is sitting in the back room in Lower Franconia! If the System Administrator even notices it, he's gonna be damned annoyed at you for putting up a message box every 7.312 seconds! You will probably be kicked off the machine.
Luckily for you, VBScript is smart enough to realized it's running on a server and won't let you make the call to MsgBox from ASP!
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