>> I want to register this ocx with windows, through vfp codes

Not strictly through VFP code but:

RUN /N <> REGSVR32.EXE <> /S

Where;
<> =windows system directory (normally c:\windows\system32)
<> = ocx you want to register.

The "/S" stops registration confirmation window being shown to screen.

So in your sample it might be:
RUN /N c:\windows\system32\REGSVR32.EXE abc.ocx /S


Gary.