Sunday, 13 February 2011
I've written about "banned APIs" before - let's start with this link and if you read it, it has a link to a previous post, and go on and follow that link and it has a link to a previous post and so on and so on. To summarize, there are three ways to ensure you are not using banned APIs in your C++ app:
- You can use the extension I blogged about. It highlights places in code you're editing or typing that calls a potentially unsafe function. That's great if you're typing fresh code,not so great if you just inherited a million lines of C++ and aren't sure if it's vulnerable to buffer overflow attacks.
- You can compile with /W4, and deal with all the C4996 warnings (and use code analysis or code review or generally find the places that someone has suppressed that warning.)
- You can include banned.h, which controls whether these unsafe functions are marked deprecated or not
None of that has changed. What I wanted to point out was a recent blog entry
from the SDL team alerting us that banned.h has been updated, and I also spotted a video
on TechNet (why a developer-focused thing is there I don't know) that shows it in action. If you write C++ code, you should be using one or more of these techniques.
Friday, 11 February 2011
If you're a Canadian and you've been thinking of playing around with the Windows P
hone Developer Tools, now would be a great time to get started. Microsoft Canada is running something they call the Great Canadian Apportunity, and the grand prize is $10,000. There are plenty of other prizes, too - Xboxen, Kinects, passes to Mesh and more. Joey has some of the details
on his blog, and you can check out the main site
to get started!
It's on till April 30th. You must be a resident of Canada and over 18 (younger developers need parental permission), not work for Microsoft etc.
Wednesday, 09 February 2011
At the end of January, the busy bees at All-in-One
(OK, they're not bees, they're Microsoft engineers) released
even more samples including Azure, setting a hotkey that Windows will route to your app even if it doesn't have focus, detecting if the machine has been locked (with Windows+L) or unlocked, downloading multiple files with ftp, and many more. As always these are in VB, C#, and almost all of them are also in native C++.
In fact, there are just so darn many samples right now that it's getting harder to find the one you want. What a great problem to have! So they've released a sample browser
to help you search and browse and generally get your hands on the code that will solve your problem and move you on to the next part of your day.
What are you waiting for? Go get it!
Monday, 07 February 2011
The architectural tools in Visual Studio Ultimate are fantastic. Often, people think they're just for for managed code, though. Not so! Here's a page on MSDN
that shows how you can use Layer Validation to validate your architecture. You'll need the Modelling and Feature Pack and parts are a little fiddly, but it can be done!
No reason to assume the architecture tools are not for C++ developers, too.
Saturday, 05 February 2011
Adding concurrency to an existing application can be remarkably simple. I have a demo where I change a for loop to a parallel for and -poof!- the app gets faster. The hard part of that demo is knowing that a given loop is ok to parallelize, that it doesn't matter what order things are done in as long as they all get done once. And, of course, knowing that the loop in question is responsible for your execution time. Making the right decision is the hard part - typing the code is easy.
With that in mind, you need advice about choosing your structures and algorithms. Here are some handy things that may help you. On the native parallel programming blog they will help you choose your parallel sort
. And on the VC++ blog, it's all about the parallel containers
. If you're going to write parallel code (and let's face it, eventually you will) you need to read this sort of thing.
Thursday, 03 February 2011
Here's a useful blog entry from Nish
that shows how simple it can be to handle what at first seems an intractable problem - how to get an unmanaged array into a managed array. The marshaller doesn't know the size of the array, but as long as you pass the length as a parameter, you can create the array yourself and copy the contents over. Not hard at all, once you know.
Tuesday, 01 February 2011
Like a lot of folks, I have a Windows Phone and I enjoy it a lot. I've filled it up with (free) games and they pass the time quickly when I have to wait in line or otherwise have an empty minute or two. C++ MVP Marius Bancila had the same experience, but unlike me he responded by writing a version of the game in MFC so he could play it on his own PC as well as on a phone.
You can get the source from his blog post, and another post and its comments (mostly in Romanian - Bing Translate is your friend there) have a nice discussion of performance issues. After all, whenever two or more C++ programmers gather together, someone is going to have an opinion about performance. Take a look for yourself!
Sunday, 30 January 2011
There are some really amazing WPF applications out there, and many of them are extraordinarily beautiful. I am not very good at making beautiful applications, though the WPF themes
help avoid the "grey boxes on a grey background" look I usually achieve. Now if you want to develop an application that presents a whole new paradigm, there should be someone on your team who really "gets" user experience and how colours work together and so on. But what if you just want to make the same sort of apps you've always made, using the latest technology instead of something a little older? You want to think the way you thought when you were doing Windows Forms, for example, and use the same tools, but end up with a WPF application or a Silverlight application.
Well, Pete Brown has an interesting blog post
speaking directly to this kind of developer. He makes the case that for these kinds of applications, you don't need to add a designer to the team. Plenty of screenshots to support his theory - see what you think. I think I agree, myself. Because the post was last year, there's lots of interesting conversation happening in the comments, too, so be sure to read those while you're there.
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