For example, If I want to: 

• 
  

  Set apodization type as Gaussian, use the enumeration ZOSAPI.SystemData.ZemaxApodizationType.Gaussian.

  
  


• 
  

  Set Apodization factor as 1

  
  

• 
  

  Untick Fast Semi-Diameters

  
  


• Tick Adjust Index Data To Environment

The following code can be used: 

TheSystemData.Aperture.ApodizationType = ZOSAPI.SystemData.ZemaxApodizationType.Gaussian;

TheSystemData.Aperture.ApodizationFactor = 1;

TheSystemData.Aperture.FastSemiDiameters = false;

TheSystemData.Environment.AdjustIndexToEnvironment = true;

If I want to:

• 
  

  Set Coating File as COATING.DAT

  
  


• 
  

  Set Scatter Profile as SCATTER_PROFILE.DAT

  
  


• 
  

  Set ABg Data File as ABG_DATA.DAT

  
  


• 
  

  Reload above data files

  
  


• 
  

  Add Title and Notes

  
  

The following code can be used: 

TheSystem.SystemData.Files.CoatingFile = 'COATING.DAT';

TheSystem.SystemData.Files.ScatterProfile = 'SCATTER_PROFILE.DAT';

TheSystem.SystemData.Files. .ABgDataFile = 'ABG_DATA.DAT';

TheSystem.SystemData.Files.ReloadFiles();

TheSystem.SystemData.TitleNotes.Title = 'Add here the title';

TheSystem.SystemData.TitleNotes.Notes = 'Add here the notes';