AwsSnapshotScheduler.Program.RegisterKeys C# (CSharp) Method

        public static void RegisterKeys(string access, string secret)
        {
            // with all this... it STILL doesn't seem to register in new command prompts or the system until you log out
            // OR until you go into System properties / Advanced / Environment variables and hit OK...

            //Registry.SetValue("HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment", "snapshot_schedule_access", access);
            //Registry.SetValue("HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment", "snapshot_schedule_secret", secret);

            System.Environment.SetEnvironmentVariable("snapshot_schedule_access", access, EnvironmentVariableTarget.Machine);
            System.Environment.SetEnvironmentVariable("snapshot_schedule_secret", secret, EnvironmentVariableTarget.Machine);

            /*
            System.Environment.SetEnvironmentVariable("snapshot_schedule_access", access, EnvironmentVariableTarget.Process);
            System.Environment.SetEnvironmentVariable("snapshot_schedule_secret", secret, EnvironmentVariableTarget.Process);
            System.Environment.SetEnvironmentVariable("snapshot_schedule_access", access, EnvironmentVariableTarget.User);
            System.Environment.SetEnvironmentVariable("snapshot_schedule_secret", secret, EnvironmentVariableTarget.User);
            */
            int result;

            SendMessageTimeout((System.IntPtr)HWND_BROADCAST,
                WM_SETTINGCHANGE, 0, "Environment", SMTO_BLOCK | SMTO_ABORTIFHUNG |
                SMTO_NOTIMEOUTIFNOTHUNG, 5000, out result);
        }