First copy the OCX file to windows\system32, then execute the following command regsvr32 c:\windows\system32\mschrt20.ocx More information about regsvr32 here, http://support.microsoft.com/kb/249873

I don’t think it has anything to do with the VC++ SDK not being installed. What you can do is to check if the MSChart control (mschrt20.ocx under windows\system32) is present and registered on the computer where you got the problem – if it’s missing, you have to install it. I’m not sure if you have to install MS Office or if it is enough (and legal) to copy and register the MSChart OCX file only. Hope this helps!