[pywin32-bugs] [ pywin32-Bugs-2787182 ] Implement a com server with a undocument interface

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Bugs item #2787182, was opened at 2009-05-05 21:14
Message generated for change (Comment added) made by mhammond
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Category: com
Group: None
>Status: Closed
>Resolution: Invalid
Priority: 5
Private: No
Submitted By: winterTTr (winterttr)
Assigned to: Nobody/Anonymous (nobody)
Summary: Implement a com server with a undocument interface

Initial Comment:
I want to use the win32com to implement a com server 
with the function to display custum inoformation 
when i move mouse over a txt file in explorer on windows.
I search for the method to do this and found a com interface 
which i can't find it in the current win32com library.
It is "IQueryInfo" , and  my code as this :

********************************** begin ***********************************

import pythoncom
from win32com.shell import shell, shellcon
import win32gui
import win32con
import os
import winerror
from win32com.server.exception import COMException
from pywintypes import IID

IPersistFile_Methods = "IsDirty Load Save SaveCompleted GetCurFile".split()
IID_IQueryInfo = "{00021500-0000-0000-C000-000000000046}"
IQueryInfo_Methods = ["GetInfoFlags","GetInfoTip"]

class ShellExtension:
    _reg_progid_ = "ShellExtension.winterTTr"
    _reg_desc_ = "Shell Extension from winterTTr"
    _reg_clsid_ = "{EB0D2B97-287A-4B91-A455-D2E021B894AC}"
    _com_interfaces_ = [ 
            pythoncom.IID_IPersistFile,
            IID(IID_IQueryInfo)]
    _public_methods_ = IPersistFile_Methods + IQueryInfo_Methods

# =============== IPersistFile : from ======================
    def GetInfoFlags(self , Flags ):
        #raise COMException(desc="No Implemented",scode=winerror.E_NOTIMPL)
        raise COMException(hresult=winerror.E_NOTIMPL)

    def GetInfoTip(self , flags ):
        print flags  
        print "======== GetInfoTip ==========="
        return ""

# =============== IPersistFile : to ======================


# =============== IPersistFile : from ======================
    def IsDirty( self ):
        raise COMException(hresult=winerror.E_NOTIMPL)

    def Load(self, filename, mode):
       #self.filename = filename
       #self.mode = mode
       print filename


    def Save( self ,FileName, Remember):
        raise COMException(hresult=winerror.E_NOTIMPL)

    def SaveCompleted( self , pszFileName):
        raise COMException(hresult=winerror.E_NOTIMPL)

    def GetCurFile( self ):
        raise COMException(hresult=winerror.E_NOTIMPL)

# =============== IPersistFile : to  ======================

def DllRegisterServer():
    # add to txt type
    key = _winreg.CreateKey(
            _winreg.HKEY_CLASSES_ROOT,
            ".txt\\shellex")
    subkey = _winreg.CreateKey(key, IID_IQueryInfo)
    _winreg.SetValueEx(subkey, None, 0, _winreg.REG_SZ, ShellExtension._reg_clsid_)
    print ShellExtension._reg_desc_, "registration [txt file] complete."

def DllUnregisterServer():
    # remove txt type
    try:
        key = _winreg.DeleteKey(
                _winreg.HKEY_CLASSES_ROOT,
                ".txt\\shellex\\%s" % IID_IQueryInfo )
    except WindowsError, details:
        import errno
        if details.errno != errno.ENOENT:
            raise
    print ShellExtension._reg_desc_, "unregistration [txt file] complete."

if __name__=='__main__':
    from win32com.server import register
    register.UseCommandLine(ShellExtension , 
                   finalize_register = DllRegisterServer,
                   finalize_unregister = DllUnregisterServer)

***************************end*********************************

and my question is :
can i use IQueryInfo IID directly  which i can't find it in pywin32com?
or is there anything wrong with  my coding ?

PS:  now  the function "Load" can be invoked ( which i can see it in from win32traceutil.py 
        when i register the server with --debug option )
        but the "GetInfoTip" is not called at all.


----------------------------------------------------------------------

>Comment By: Mark Hammond (mhammond)
Date: 2009-05-06 09:46

Message:
Sorry but this tracker is for reporting bugs, not for general usage
questions.  .  You might like to resend your question to the python-win32
mailing list.  You need to be subscribed to the list before you can post to
it - see http://mail.python.org/mailman/listinfo/python-win32 for
subscription options.


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=551954&aid=2787182&group_id=78018