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                                  • I received occasionally the next exceptions. The application is build on DevExpress components.
                                    To solve the first exception, I searched through the complete application and I didn't use EnableVisualStyles.
                                    For the second exception: it happend when clicking an item in the context menu of the schedular control (my used namespace is starting with WinClient)

                                    FIRST EXCEPTION:

                                    Exception: System.Runtime.InteropServices.SEHException
                                    Message: Een extern onderdeel heeft een uitzondering veroorzaakt.
                                    Source: System.Windows.Forms
                                       at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
                                       at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
                                       at System.Windows.Forms.Control.DefWndProc(Message& m)
                                       at System.Windows.Forms.Control.WndProc(Message& m)
                                       at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
                                       at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
                                       at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

                                    2nd EXCEPTION:

                                    Exception: System.NullReferenceException
                                    Message: De objectverwijzing is niet op een exemplaar van een object ingesteld.
                                    Source: System.Drawing
                                       at System.Drawing.Graphics.FillRectangle(Brush brush, Int32 x, Int32 y, Int32 width, Int32 height)
                                       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
                                       at System.Windows.Forms.ComponentManager.System.Windows.Forms.UnsafeNativeMethods+IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
                                       at System.Windows.Forms.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
                                       at System.Windows.Forms.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
                                       at System.Windows.Forms.Application.RunDialog(Form form)
                                       at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
                                       at WinClient.Client.Planning.PlanningByType.DoModify(Object sender, EventArgs e)
                                       at DevExpress.Utils.Menu.DXMenuItem.OnClick()
                                       at DevExpress.Utils.Menu.DXPopupStandardMenu.OnStandardMenuClick(Object sender, EventArgs e)
                                       at System.Windows.Forms.MenuItem.OnClick(EventArgs e)
                                       at System.Windows.Forms.MenuItemData.Execute()
                                       at System.Windows.Forms.Command.Invoke()
                                       at System.Windows.Forms.Control.WmCommand(Message& m)
                                       at System.Windows.Forms.Control.WndProc(Message& m)
                                       at DevExpress.XtraScheduler.SchedulerControl.WndProc(Message& m)
                                       at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
                                       at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
                                       at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

                                    Steps to Reproduce:

                                    I can't reproduce these problems.

                                    Actual Results:

                                    Received unexpected exceptions.

                                    Expected Results:

                                    No exceptions

                                0

                                Hi Thieu,

                                Unfortunately, this problem has not been reported to us in the past. Furthermore, I'm unable to replicate this issue. The call stack I have received from you doesn't allow me to determine the cause of the issue. Could you please attach a sample project which replicates the issue. We'll investigate it and try to provide you with a solution.

                                Thanks,
                                Stan.

                                If you need additional product information, write to us at info@devexpress.com or call us at +1 (818) 844-3383

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