After updating method in Active X exe on the server, client side's application using that Active X methods is to be recompiled.
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After updating method in Active X exe on the server, client side's application using that Active X methods is to be recompiled.
If you keep your ActiveX EXE binary compatable with your previous version, you won't need to re-compile your client side application.
Look in project - properties menu.
Changes to the interface of your ActiveX component may cause a break in binary compatability anyway, in which case you will need to re-compile your client side app. Changes to the 'inner workings' will not necessetate a re-compile.