The Final Sample
A final sample COM server demonstrates
wrapping and unwrapping objects, how to use
IDispatch
objects when passed as parameters to COM
functions, and also how to debug your COM servers. This example is
contrived and does nothing useful other than demonstrate these
concepts.
The sample exposes two COM objects, a Parent
object and a Child object. The
Parent object is registered with COM so VB code
can use CreateObject to create it. The
Child object isn’t registered and can be
created only by calling the CreateChild() method
on the Parent. The Child object
has no methods, just a Name property.
The Parent object also has a method called
KissChild(), that should be called with a
Child object previously created by the parent.
The KissChild() method demonstrates how to use the
IDispatch passed to the method and also how to
unwrap the IDispatch to obtain the underlying
Python object.
Finally, the code has a number of print statements
and a lack of error handling. We use the debugging techniques to see
these print statements and also a Python exception
raised:
# ContrivedServer.py # # A contrived sample Python server that demonstrates # wrapping, unwrapping, and passing IDispatch objects. # Import the utilities for wrapping and unwrapping. from win32com.server.util import wrap, unwrap import win32com.client # Although we are able to register our Parent object for debugging, # our Child object is not registered, so this won't work. To get # the debugging behavior for our wrapped ...