Vb. NET to confirm the Exit dialog box implementation

The implementation methods are divided into two main categories: Form events and control events, the following one by one shows: First, formclosing events (and several other methods)

A.

Private Sub frmpractise_formclosing (ByVal sender as Object, ByVal e as System.Windows.Forms.FormClosingEventArgs) Handles me.formclosing        If MessageBox.Show ("OK to exit?") "," Exit confirmation ", Messageboxbuttons.yesno, messageboxicon.question) = Windows.Forms.DialogResult.No then            e.cancel = true< C2/>end If    End Sub

B.

Private Sub practise_formclosing (ByVal sender as Object, ByVal e as System.Windows.Forms.FormClosingEventArgs) Handles Me . FormClosing        If MsgBox ("OK to exit?") ", Messageboxbuttons.okcancel," exit confirmation ") = Windows.Forms.DialogResult.Cancel then            e.cancel = True        end If    End Sub

C.

Private Sub practise_formclosing (ByVal sender as Object, ByVal e as System.Windows.Forms.FormClosingEventArgs) Handles Me . FormClosing        Dim p as Integer        p = MsgBox ("Do you really want to quit the system?") ", Msgboxstyle.okcancel," hint ")        if P = 2 then            e.cancel = True        end If    End Sub

D. (Most simple)

Private Sub practise_formclosing (ByVal sender as Object, ByVal e as System.Windows.Forms.FormClosingEventArgs) Handles Me . FormClosing        If MsgBox ("Are you sure you want to quit the program?") ", Msgboxstyle.okcancel," exit hint ") = Msgboxresult.cancel then E.cancel = True    End Sub

The above is just the use of clicking the window Close button, if you click Exit directly on the form control, you can do the following: Second, Button_Click event

Private Sub Btnquit_click (ByVal sender as System.Object, ByVal e as System.EventArgs) Handles Btnquit.click        If MsgBox ( "Do you want to exit the system?" ", Msgboxstyle.yesno + msgboxstyle.question," hint ") = Msgboxresult.yes then            application.exit ()        end If    End Sub

Vb. NET to confirm the Exit dialog box implementation