Dispose form by Close button [Resolved]

[albertlse]

I would like to add a "confirm exit?" message box when I press the Close(X) button at the top right of my form.

So I try to modify the following code found at the Region " Windows Form Designer generated code ":

Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

But I failed. What I one is:
When I press the Close(X) button, the form is still open, and a message box will pop up asking whether you are sure to exit?
If Yes, the form will be dispose.
If No, no action is taken, and the form is still remain there.

How can I do so?

Please guide. Thank you.