if they are not ,how vb6 use them?

Before Activex came along, all controls were done in windows, things like
list box's and edit box's.
Everything in windows is a window, so an edit box is just a special window
thats already on the system and built in. Then ActiveX came along and those
you must install in the tool bar.

So thats the difference. To a programmer, the old way has the advantage of
being smaller with no dependencies, and you just use them. ActiveX however
means you as a VB programmer can make a control. The old way has to be done
by a C programmer.