dotnet windows forms: Prevent user from closing form but allow form to close at logout -- dotnet windows forms

Prevent user from closing form but allow form to close at logout

jquiet
7/30/2005 7:47:02 PM

dotnet windows forms:

I have added this code in an attempt to prevent the user from closing my
simple 1 form application, but the application now prevents logout and
shutdown. What is the proper way to prevent a user from closing the app but
still have it close gracefully at shutdown/logoff?

Private Sub Form1_Closing(ByVal sender As Object, ByVal e As
System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
e.Cancel = True
End Sub

Thanks

RE: Prevent user from closing form but allow form to close at logout

Sergey Pikhulya
7/31/2005 3:23:01 PM

Imports System.ComponentModel

Class DemoForm
Inherits Form

Private Const WM_QUERYENDSESSION = &H11

Private canExit As Boolean
Protected Overrides Sub OnClosing(ByVal e As CancelEventArgs)
e.Cancel = Not canExit
End Sub

Protected Overrides Sub WndProc(ByRef m As Message)
If m.Msg = WM_QUERYENDSESSION Then
canExit = True
End If
MyBase.WndProc(m)
End Sub

End Class

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