Category Archives: Windows

Joco-ADPhoto: active directory photo editor, also introducing my tools project

It’s been so long since I last wrote… My previous post was about the directory object dialog that I implemented in my framework. My plan was to use it for something, and that something is finally here. It’s a tool that you can use to save photos for accounts in active directory and retrieve them. I also set up a new project on Google named Joco Tools. That is because I’m planning on releasing a lot more useful stuff here. Continue reading

Directory object dialog in .NET, and advanced COM marshaling

Last week I wanted to start a new .NET project, and I needed a directory object picker for it. I searched the web and found some solutions, but they just didn’t look right and decided that I can do a lot better than those. So in the spirit of creating good and reusable code, I started implementing my own IDsObjectPicker wrapper in my framework. I thought it would be easy, and it turned out to be anything but, but the result was awesome: clean, easy to use, and it works. And just like last time, I learned a lot about COM interop, you can read all about it here, or just scroll through and grab it already. Continue reading

IPv6 in my home intranet with SLAAC, 6to4 and a dynamic IP

I set up 6to4 in my home intranet, and I’ll share my experiences. The web is full of 6to4 how-tos, but there are a few reasons why my case is special: I have a dynamic IPv4 address, I want to share IPv6 in my network, and I want the cleanest solution possible. Quite a common scenario, I think, so here’s how it’s done. Continue reading

How to impersonate the Windows system account in an application

During the research of my previous post, I wanted to find out if it’s possible to impersonate the system account in an application (NT AUTHORITY\SYSTEM). Apparently, and much to my surprise, it’s a bit more powerful than the administrator account. The short answer is that there’s no clean, reliable, non-intrusive and portable way to do that, and in most cases, there are much better solutions. But if you really want the impersonation, then here are the possibilities that I found on my Windows 7 system. Continue reading

Getting the size of a volume shadow copy snapshot

The volume shadow service (VSS) has a storage limit on each volume. If it needs more space for a new snapshot, it deletes an old one. If you want to create a smarter space management algorithm, which also considers the size of individual snapshots, you’re in trouble, because getting the size is not documented anywhere. But now it is :) . Continue reading

Windows antivirus API in .NET, and a COM interop crash course

Like I said in my previous post, I already coded something cool in my framework, and here it is: .NET code to call the Windows antivirus API. The best use case scenario I can think of is when retrieving and then redistributing file content from an untrusted data source, especially a web upload form. In cases like this, content might slip through the realtime protection of most antivirus products, and an API like the one I created is the only solution. Continue reading