A tough competition to Microsoft Groove

I installed collanos today. Seems to be a very good peer-to-peer open-source collaboration software.

UDT (User Defined Types) and COM

During one of my recent projects I came across a typical problem of passing user-defined types from my COM component. The problem I had was that I was using Attributed ATL (one which even Microsoft seems to have abandoned ;) ). I came up with the following way to expose UDT from COM. Beware though, passing UDT supporting IDispatch interface is a different ball-game altogether and scripting languages don't readily support UDT's.

Undo - Redo and Memento Pattern

How many times we have come across the problem of implementing undo/redo feature in course of software development? I reckon not many a times but ever wondered how to implement such a neat feature (like in office applications) in the software design.
Lo and Behold, the Memento Pattern is here to the rescue.

Some useful links to opensource projects hosts

Here are some links to the various open source project hosting sites। I visit them regularly to keep up with whats new, these guys are coming up with.

Let the voyage begin

Starting this new blog today.