Been trying to figure out what that Function is supposed to do, however had no luck so far... Checked the pdf Documentation but cannot find any mention of said function either.

It seems to either be missing a value Parameter or the "flag" parameter is supposed to be the value to be set. Since I couldn't find any flag in the header files that seemed fitting I assumed the latter, however regardless of the value entered nothing happened.

What is this Function supposed to do and what needs to be specified in the flag for it to actually do something? Do we need to call some other function prior / after calling this one for something to get updated?