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In a Python script I have to replace usage of comtypes by win32com and pythoncom. Essentially I have this code:

from comtypes.client import CreateObject, GetEvents

object_IXXObjManager = comtypes.client.CreateObject(xxxId)
connection_IXXObjManager = GetEvents(object_IXXObjManager, IXXObjManagerEventHandler())

object_IXXObjCommunications = object_IXXObjManager.QueryInterface(comtypes.gen.XXOBJLib.IXXObjCommunications)
connection_IXXObjCommunications = GetEvents(object_IXXObjCommunications, IXXObjCommunicationEventHandler(), interface=comtypes.gen.XXOBJLib.IXXObjCommunicationsEvents)

and the target is to get similar functionality using win32com. In my understanding the event handler classes will require no changes. First part was easy:

import win32com.client
object_IXXObjManager = win32com.client.Dispatch(xxxId)
event_IXXObjManager = win32com.client.WithEvents(object_IXXObjManager, IXXObjManagerEventHandler)

However, I got stuck when trying to map an event handler to a object from queried interface.

object_IXXObjManager._oleobj_.QueryInterface( ??? )

Could you help me? I do have general sw development experience, however limited COM knowledge.

martineau
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skotka
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  • I ported the initial part of the code: `object_IXXObjManager = win32com.client.Dispatch(xxxId) event_IXXObjManager = win32com.client.WithEvents(object_IXXObjManager, IXXObjManagerEventHandler)` but I guess I have to add also something like `object_IXXObjManager._oleobj_.QueryInterface( ??? )` which I do not know exactly how to do. – skotka Oct 28 '15 at 18:34

1 Answers1

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The replacement for

object_IXXObjCommunications = object_IXXObjManager.QueryInterface(comtypes.gen.XXOBJLib.IXXObjCommunications)

can be like this:

iface = object_XXObjManager._oleobj_.QueryInterface(pythoncom.IID_IDispatch)
iface_Communications = win32com.client.CastTo(iface,"XXObjCommunications")
connection_XXObjCommunications = win32com.client.Dispatch(iface_Communications)
skotka
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  • I noticed that there are different interfaces between python and com: `comtypes`, `pythoncom` and `win32com`. I wonder if you know the differences between the different interfaces and why you would one over the other? – alpha_989 Jul 28 '18 at 20:56