>How can I create a .DLL from .OCX so that other programming language can use it because other programming language like fivewin does not support .OCX.

I think you will find a bigger problem with the memory model
used for fivewin - so - when you want to use a CURRENT MS ACTIVE X
control based on OCX ? You can't - cause of that memory model.

But in the meantime - you are out there on the bleeding edge.
If I were you ?
I'd drop FiveWin because of its memory model
and switch over to Alaska Software xbase++ -
you CAN use ANY library from ANY topology with it.

You could try to make a dll wrapper for an ocx, of course -
but the 'recommended' way to do that involves C++ or MS VC++ .

There have been some Delphi Folks who have tried it as well
for VCL's - so the approach should not be that different.

BUT ? you really are hitting the window for FiveWin.