if you're going the object oriented way, it should definitely work. Start with the object, followed by a dot, then you should get a list of available (class) members.
If you want to address something in the same class/object, then you could start with "this." or alternatively there is a shortcut to get everything that is available right now: CTRL + SPACE.
And inside following Inline Code, there is no auto completion, since you write native code (only). For example: include <windows.h>