Export Graphics depending on SytemModelGroup

Export Graphics depending on SytemModelGroup

Hi.
Every item in Zenon can be connected to a SystemModelGroup.
I already have code to export screens, functions and more which are connected to the SystemModelGroup  "Customized".
But it seems, that I can not do that for graphics and symbols.
Here is example-code out of my application. Besides of the lines commented out it is working fine.
There is no GetDynamicProperty for Graphics.
Is there a possibility to get the SystemModelGroup of a graphic file?
  2. #region Graphics
  3. //11_Graphics anlegen
  4. strPath = Path.Combine(strExportPfad, "11_Graphics");

  6. if (Directory.Exists(strPath))
  7. {
  8. }
  9. else
  10. {
  11.     Directory.CreateDirectory(strPath);
  12. }
  13. ////Graphics exportieren.
  14. for(int i=0; i < prj.FileManagement.GetFolder(FolderPath.Graphics).FileCount;i++)
  15. {
  16.     String strZwischenspeicher;
  17.     //strZwischenspeicher = prj.FileManagement.GetFolder(FolderPath.Graphics).GetFileItem(i).GetDynamicProperty("SystemModelGroup.SystemModelGroup").ToString();

  19.     //if (strZwischenspeicher.Equals("Customized"))
  20.     //{
  21. strFilePath1 = Path.Combine(prj.Path, "zenon");
  22. strFilePath1 = Path.Combine(strFilePath1, "custom");
  23. strFilePath1 = Path.Combine(strFilePath1, prj.FileManagement.GetFolder(FolderPath.Graphics).Name);
  24. strFilePath1 = Path.Combine(strFilePath1, prj.FileManagement.GetFolder(FolderPath.Graphics).GetFileItem(i).Name);
  25. strFilePath2 = Path.Combine(strPath, prj.FileManagement.GetFolder(FolderPath.Graphics).GetFileItem(i).Name);
  26. File.Copy(strFilePath1, strFilePath2);
  27.     //}
  28. }
  29. #endregion