>Yesterday, I uninstall an OCX. The program uninstalled everything except that the OCX is still displayed in the list of control in Visual FoxPro.
>
>The technical support told me that I have to unregister the OCX from the windows/registry. What is the step involved to do that?

There are refrences to unregistering controls in ctrlhlp.hlp. Pretty vague. Some are VB related. Two you might try:
REGOCX32 /u
REGSVR32 /u

You might want to unmark the control from the options menu, rather than unregistering it. Various registration removals in the past have required FoxPro reinstall, although most I know of happened from Wizard Setup / Uninstall.

Good Luck :)