Vertical Tab Ctrl

I'm trying to make a TAB Control appear vertical.

I've been told that TCS_VERTICAL flag is simply passed as a parameter to the create function. I was also told that this works from Version 4.70 of Microsoft Visual C++ onwards. I can't make this work, nor can I find mention of a TCS_VERTICAL in the help files.

So, my question is using MS Visual C++ v5 how do I make a Tab control vertical.