public class sicherung
{
    [DeclareEventHandler("Eplan.EplApi.OnUserPreCloseProject")]
    public void Function()
    {
        string strFullProjectname =
        PathMap.SubstitutePath("$(P)");
        string strProjectpath =
            PathMap.SubstitutePath("F:" + @"\");
        string strProjectname =
            PathMap.SubstitutePath("$(PROJECTNAME)");

        DialogResult Result = MessageBox.Show(
            "Soll eine Sicherung für das Projekt\n'"
            + strProjectname +
            "'\nerzeugt werden?",
            "Datensicherung",
            MessageBoxButtons.YesNo,
            MessageBoxIcon.Question
            );

        if (Result == DialogResult.Yes)
 
          {

                string myTime = System.DateTime.Now.ToString("yyyy.MM.dd");
                string hour = System.DateTime.Now.Hour.ToString();
                string minute = System.DateTime.Now.Minute.ToString();

                string Project = string.Empty;
		Project = GetProject(); 

                Progress progress = new Progress("SimpleProgress");
                progress.BeginPart(100, "");
                progress.SetAllowCancel(true);



                if (!progress.Canceled())
                {
                    progress.BeginPart(33, "Backup");
                    ActionCallingContext backupContext = new ActionCallingContext();
                    backupContext.AddParameter("BACKUPMEDIA", "DISK");
                    backupContext.AddParameter("BACKUPMETHOD", "BACKUP");
                    backupContext.AddParameter("COMPRESSPRJ", "0");
                    backupContext.AddParameter("INCLEXTDOCS", "1");
                    backupContext.AddParameter("BACKUPAMOUNT", "BACKUPAMOUNT_ALL");
                    backupContext.AddParameter("INCLIMAGES", "1");
                    backupContext.AddParameter("LogMsgActionDone", "true");
                    backupContext.AddParameter("DESTINATIONPATH", strProjectname);
                    backupContext.AddParameter("PROJECTNAME", Project);
                    backupContext.AddParameter("TYPE", "PROJECT");
                    backupContext.AddParameter("ARCHIVENAME", Project + "_" + myTime + "_" + hour + "." + minute + ".");
                    new CommandLineInterpreter().Execute("backup", backupContext);
                    progress.EndPart();
                    
                }
                progress.EndPart(true);
            }
            
            return;
        }
    }