Posted on 1998-03-18
Last Modified: 2011-10-03
I wrote a small program which uses the MSComm32.ocx to transfert data from serial port. On my computer, it works very weel, but when I want to execute it on a other computer, an error message tells me that a not supported operation was tempted. This error occurs each time that the program performs the UpdateData() function.  I used the class wizard to map a control variable to the ocx. My question is why it is working on my PC and not on other? I tried to compile my app whith the MFC in a static library but I got the same error.
Question by:adnrwin
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Expert Comment

ID: 1183612
  Are you sure that the OCX is available and registered on the "other computer"?

-=- James.

Author Comment

ID: 1183613
The OCX wasn't registered on the other computer. I regitered it (with Visual C++ 4.0 CD) and my program worked. What files are needed to use the MSComm32.ocx and what my installation program does have to write in the registry for registering this OCX?

Accepted Solution

stefanr earned 20 total points
ID: 1183614
You register OCX:es with the program REGSVR32.EXE, that is supplied with the NT system itself.

C:\WINNT\SYSTEM32>regsvr32 mscomm32.ocx

To unregister, just use the /u switch. Theres no need to write in the registry yourself.


Expert Comment

ID: 1183615
  "stefanr" is right...  You can make the calls to REGSVR32.EXE from your (un)install program.

-=- James.

Author Comment

ID: 1183616
Thanks guys!!

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