通过ADO连接打开csv-File - 列限制为255 /或只使用其他文件类型？

I have quite a large csv-File (about 800MB) which I need to access from an Excel File via VBA (I am using Excel 2010) to run some calculations. Now I would like to avoid opening the file directly for Excel needs aeons to accomplish that. I have quite a large csv-File (about 800MB) whi