System.NullReferenceException: Object reference not set to an instance of an object. at System.Windows.Forms.NativeWindow.WindowClass.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[Former user]

System.NullReferenceException: Object reference not set to an instance of an object. at System.Windows.Forms.NativeWindow.WindowClass.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[Jason Carr]

Unfortunately this one is nearly impossible to hunt down. If you're still here Anonymous, hit me up on the forums (@Jason Carr) and we can discuss. I would need a lot more information on the Windows version, LaunchBox version, and what you were doing at the time.