Click here to Skip to main content
Click here to Skip to main content
Add your own
alternative version

Using COM Objects in Scripting Languages -- Part 2 (Python)

, 20 Apr 2010 CPOL
This article shows how to instantiate a COM object in Python and use its methods and properties.
// SimpleCOM.cpp : Implementation of DLL Exports.


#include "stdafx.h"
#include "resource.h"
#include "SimpleCOM_i.h"
#include "dllmain.h"
#include "dlldatax.h"

// Used to determine whether the DLL can be unloaded by OLE
STDAPI DllCanUnloadNow(void)
{
#ifdef _MERGE_PROXYSTUB
    HRESULT hr = PrxDllCanUnloadNow();
    if (hr != S_OK)
        return hr;
#endif
    AFX_MANAGE_STATE(AfxGetStaticModuleState());
    return (AfxDllCanUnloadNow()==S_OK && _AtlModule.GetLockCount()==0) ? S_OK : S_FALSE;
}


// Returns a class factory to create an object of the requested type
STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID* ppv)
{
#ifdef _MERGE_PROXYSTUB
    if (PrxDllGetClassObject(rclsid, riid, ppv) == S_OK)
        return S_OK;
#endif
    return _AtlModule.DllGetClassObject(rclsid, riid, ppv);
}


// DllRegisterServer - Adds entries to the system registry
STDAPI DllRegisterServer(void)
{
    // registers object, typelib and all interfaces in typelib
    HRESULT hr = _AtlModule.DllRegisterServer();
#ifdef _MERGE_PROXYSTUB
    if (FAILED(hr))
        return hr;
    hr = PrxDllRegisterServer();
#endif
	return hr;
}


// DllUnregisterServer - Removes entries from the system registry
STDAPI DllUnregisterServer(void)
{
	HRESULT hr = _AtlModule.DllUnregisterServer();
#ifdef _MERGE_PROXYSTUB
    if (FAILED(hr))
        return hr;
    hr = PrxDllRegisterServer();
    if (FAILED(hr))
        return hr;
    hr = PrxDllUnregisterServer();
#endif
	return hr;
}

// DllInstall - Adds/Removes entries to the system registry per user
//              per machine.	
STDAPI DllInstall(BOOL bInstall, LPCWSTR pszCmdLine)
{
    HRESULT hr = E_FAIL;
    static const wchar_t szUserSwitch[] = _T("user");

    if (pszCmdLine != NULL)
    {
    	if (_wcsnicmp(pszCmdLine, szUserSwitch, _countof(szUserSwitch)) == 0)
    	{
    		AtlSetPerUserRegistration(true);
    	}
    }

    if (bInstall)
    {	
    	hr = DllRegisterServer();
    	if (FAILED(hr))
    	{	
    		DllUnregisterServer();
    	}
    }
    else
    {
    	hr = DllUnregisterServer();
    }

    return hr;
}


By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

Sharjith
Engineer Tata Technologies Ltd
India India
Sharjith is a Mechanical Engineer with strong passion for Automobiles, Aircrafts and Software development.

| Advertise | Privacy | Terms of Use | Mobile
Web03 | 2.8.141223.1 | Last Updated 20 Apr 2010
Article Copyright 2010 by Sharjith
Everything else Copyright © CodeProject, 1999-2014
Layout: fixed | fluid