vxd-Files???

Querstion:

How can I use a vxd-File (I have buyed a vxd-File but can not use it)
I just have the vxd-File and will use the funktions what are included

I didnt find anything about vxd in the Delphi-Manual

My System:
Pentium II
Win 95
Delphi 3.0 Client/Server

Thanks for reading and Helping !!!