C# - Export dxf file with export options to set the required version R11

Hey guys, 

i've been experimenting with the file saving/exporting options, but i've got no clue how i can access the options hidden in the DXF export options dialog.

I found this in the api, but it doesn't seem to be available: https://community.coreldraw.com/sdk/api/draw/20/c/dxfexport 

It also seems there's a way to create an ExportFilter of sorts that should be able to set the required version, but i can't figure that part out. 

Can someone help me with this? 

Thanks in advance!