>>>Hi,
>>>
>>>I use DBITech List bar OCX control at the top of the application. That is, I have a VFP toolbar which includes the OCX control. The problem is when some customers do not register the OCX and run the app. This caused the error
>>>

>>>OLE error code 0x80040154: Class not registered
>>>

>>>So, I need to unregister this OCX on my development PC, so that I can test and come up with a strategy to show a message instead of an error. The only place where I see on my PC this ocx (ctlstbar.ocx) is where I keep the source of the files.
>>>Where and how do I un-register it?
>>>
>>>TIA
>>
>>
>>regsvr32 /u fullpath_to_ocx
>
>Thank you. And I can understand that I will be able to register this OCX later, using the same command but without the /u. Correct?

Yes