[python-win32] COM server AddIn

[Johannes Brunen]

Hi,

I have a problem implementing a simple COM server AddIn which should satisfy a special COM interface
provided by an application I'm using.

The server application: CADdy.exe  =>  type library CADdy.tlb
The AddIn interface of CADdy.tlb: ICADdyAddIn

From
gencache.EnsureModule('{9C3BB401-114D-11D4-AC72-00105A4925FC}', 0, 1, 2, bForDemand=True) # CADdy.tlb
I got
class ICADdyAddIn(DispatchBaseClass):
	"""ICADdyAddIn Interface"""
	CLSID = IID('{14F65AE1-4671-11D4-8B1A-00105A49278B}')
	coclass_clsid = None

	def Exit(self):
		"""method Exit"""
		return self._oleobj_.InvokeTypes(2, LCID, 1, (24, 0), (),)

	def Init(self, theCADdy=defaultNamedNotOptArg):
		"""method Init"""
		return self._oleobj_.InvokeTypes(1, LCID, 1, (24, 0), ((9, 1),),theCADdy
			)

	_prop_map_get_ = {
		"CLSID": (3, 2, (8, 0), (), "CLSID", None),
		"Description": (5, 2, (8, 0), (), "Description", None),
		"ProgId": (4, 2, (8, 0), (), "ProgId", None),
	}
	_prop_map_put_ = {
	}

My AddIn COM server Addin.py:
##
## Addin1.py - A very simple CADdy AddIn COM server
##
from win32com import universal
from win32com.client import gencache
import pythoncom
import sys

gencache.EnsureModule('{9C3BB401-114D-11D4-AC72-00105A4925FC}', 0, 1, 2, bForDemand=True) # CADdy.tlb

universal.RegisterInterfaces('{9C3BB401-114D-11D4-AC72-00105A4925FC}', 0, 1, 2, ['ICADdyAddIn'])

class AddIn1:
    _com_interfaces_ = ['ICADdyAddIn']
    _public_methods_ = []
    _reg_clsctx_ = pythoncom.CLSCTX_INPROC_SERVER
    _reg_clsid_ = "{AB6C657A-2C26-4BD0-ABB8-D777BC91F199}" # From pythoncom.CreateGuid()
    _reg_progid_ = "CADdyAddIn.PythonTest1"
    _reg_policy_spec_ = "win32com.server.policy.EventHandlerPolicy"

    def __init__(self):
        self.appHostApp = None    
    
    def Init(self, theCADdy):
        """method Init"""
        self.appHostApp = theCADdy
        
    def Exit(self):
        """method Exit"""
        self.appHostApp = None

    def getCLSID(self):
        return _reg_clsid_
        
    def getProgId(self):
        return _reg_progid_
        
    def getDescription(self):
        return "CADdy++ CADdyAddIn.PythonTest1"
    
if __name__ == '__main__':
    import win32com.server.register
    win32com.server.register.UseCommandLine(AddIn1)

This won't work! I can't start this COM server from my application.

First some questions: Do I have to write  _public_methods_ = ['Init', 'Exit'] in order to satisfy the required interface ICADdyAddIn?
How do I handle the properties from ICADdyAddIn
	_prop_map_get_ = {
		"CLSID": (3, 2, (8, 0), (), "CLSID", None),
		"Description": (5, 2, (8, 0), (), "Description", None),
		"ProgId": (4, 2, (8, 0), (), "ProgId", None),
	}
correctly? Do have to use _public_attrs_ and if so how do I use it correctly? I used the methods getCLSID, getProgId and getDescription
just to give it a try but they seem to be totaly wrong.

I used the excelAddIn.py demo as a start. However, is this the recommended way for writing a COM server addin?

I have to mention that I'm quite new to Python as well as to PythonCOM. So my questions may be quite naive,
but I would very much appreciate some help for this topic.

With best regards

Johannes