Nan,
When you change this property in MAX, you are actually modifying the camera file for the session (*.icd file). These file can be modified just like a text file. You could programtically modify parse and modify the "SlaveAcqMode (STANDARD)" line in the camera file to reflect the mode you want to use. Below is a KB that explains how to parse and modify an *.iid file, you can use the same method on the icd file.
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/ccc5bb5990aa416786256c23006e687c?OpenDocument
Best Regards,
Chris Drymalla