🚀 go-pugleaf

I have a SOAP web-service ISAPI and a client application (win32) that 
connects to it - both written in BCB6. I connect to the service in the 
client app using the WSDL Importer which creates a static binding the 
service.  I release both apps to users who end up deploying the web-service 
themselves on their own network.



In the next release I need to update the web-service with some new 
functionality and consume it from the updated client app.



What I am concerned with is the user that gets the update - installs it on 
the client and tries to use it without first updating the web-service ISAPI. 
I suspect that the client service interface will fail to even bind. Or at 
least it will throw an exception when it tries to call a function that does 
not exist.



I want to do something like this:



clientapp::Foo()

{

  bind to web-service

  if (web-service is the old one)

  {

    prompt user to update the web-service ISAPI first

    return;

  }



  // its definitely the new service

  call the new web-service function()

}





I guess I can simply wrap the binding and calling in a try catch and if 
there is a soap exception assume it is the old service - but that sucks - it 
is an assumption.



What do you suggest?

BCB 6.